The certification of Cisco IP Telephony Design Specialist focuses on the demonstration of significant competency in telephony areas related to jobs roles and solutions. With additional certifications, network administrators can also offer their services in telephony industry.

It is designed to meet market needs where you can get dream career easily. It focuses on validate proficiency in installing, supporting, designing and multi-service network solution.

Cisco IP Telephony Design Specialist gets knowledge about Cisco IP telephony support and validates the ability of individuals to operate, support and design advanced Cisco IP telephony solutions in organizations.

A Cisco IP Telephony Design Specialist has to get training on following modules.

• Cisco Quality of Service implementation
• IP Telephony Design
• IP Telephony Express

The training of Cisco IP Telephony Design Specialist qualifies a person about the skills and knowledge of enterprise call manager, IP network development, Unity and Quality of service. It helps you to develop understanding about dial plan, call manager review, external tool, voice quality and configuration solutions.

The use of IP telephony is developed this year and it will provide an attractive chance to start a flourishing career in this field. The purpose of this course is to boost IT professional’s skills in IP telephony field.  You can also get training material from Cisco website where you can find varieties of tutorials and lesions about IP Telephony Design Specialist certification.

It also develops your skills regarding quality of services issues that are the essential part of IP telephony. Before telephony certification, it will help you to gain momentum that IT professional requires to handle other infrastructure issues. The certification of IP Telephony Design Specialist develops solid IP telephony expertise, and skills.

The use of IP telephony services is increasing in every organization as they prefer to set up call centers to provide instant coverage of customer issues.  An IP Telephony Design Specialist can easily builds up his own small call centre set up and outsource it easily. He can also works as part time telephony administrator for various call centres. It offers wide career opportunities to IT and other professionals. You only need to get register for this course at Cisco website. You can get training of this certification through Cisco lessons and sample exam questions.  It is the need of time that individual should acquire this certification if they want to survive in IT market successfully. The overview of IP Telephony Design Specialist certification will help you a lot if you want to select it as a career.

Multicast routing protocols are evolved in core based approach for better performance of its operations in distributed networks. The structure and location of routing tree is dominant determinant on the performance of protocol in multicast applications. In group applications that involve instant interaction in participations including audio visual conferencing, the protocol becomes sensitive for multipoint communication under multiple metrics to fulfill the demands of quality of services. This process of tree construction seems crucial for protocols operations because lack of coreselection can degrade the efficiency of protocol.

Multicasting protocol enables a collection of multiple routers to construct distribution trees. There is list of five multicast protocols that help you to comprehend their functions.

DVMRP- The first multicast routing protocols are hampered with multiple limitations that make this method unattractive for wide range of application. DVMRP is a dense mode protocol that uses prune and implicit method to deliver traffic. DVRMP make use source based distribution trees in form of S G.

MOSPF-It extends OSPF for multicasting in dense mode. MOSFP shows explicit join method to flood entire domain in multicast traffic from source to destination. It likes DVMRP uses source destination trees in form of S.G.

PIM-DM-It operates in dense mode but it is different from PIM spare mode. Unlike MOSPF and DVRMP, PIM-DM helps router to use unicast routing protocol and executes the process of RPF checks with the use of unicast routing table. It contains PIM-DM in an implicit join message that helps routers to use prune method and flood to deliver traffic anywhere. PIM-DIM also uses source based distribution tress as other multicasting protocols do.

PIM-SM- It helps routers to use unitcast routing table and performs the checks of RPF during unicast table. It also contains explicit message to determine the location of receivers and send messages to their neighbors. It uses RP routers in form of initial source of multicast group traffic and construct trees in form of G. PIM-SM also moves to source based tree if routing path is shorter than RP for multicast traffic group.

CBT- it contains all the characteristics of PIM-SM like explicit join, sparse mode and shared G trees but it is efficient to find sourced than PIM-SM.

CTI / Telephony Convergence

Computer telephony integration is an effective means of telephony and computer talk to each other that increases the coverage of data, voice and telephony. It includes integration of email, web, fax and voice transfer with computer system. CTI uses for computerized services in call centres to resolve the problem of worldwide customers.

CTI Call Management

There is wide use of CTI applications in call management roles.

Interactive voice response system is used to route calls of customers via the selection of keypad on phone. For example, when you make call to any customer service helpline, they request you to follow instructions like press 1 for sales and 2 for marketing.

It identifies call information like number of dialed and anger display with information of caller.

Computer controlled or automatic dialing in which you can use predictive dialing to maximize the efficiency of telemarketing agent.

• It displays call queuing details to the supervisor of call centre that handles improvement of call handling agents.
• Control various aspects of call like hanging up, answering and teleconferencing.
• It co-ordinates data transfer role across the network of telephone.
• Formation of reports on the performance of agent and call handling
• Real time monitoring of performance and feedback for agents

Efficiency via CTI Automation

CTI enables business owners to improve their customer service, and other staff issues. Pc based telephony system works via call routing and intelligent dialing system. CTI automated transactions and pre-record information permits inbound call centres to offload the volume of their call with equivalent savings. It helps to perform tasks in half time that saves time of customers and agents. It enhances the caller satisfaction as his problem is solved in half time and customer can seek assistance 24/7 throughout week.

Agent Screen Population

Dialed number identification allows CTI application to inhabit the agent screen with the display of pertinent data that is based on originating or caller number. It delivers both agent and caller information that caller wants to get like product details. A CTI application gets relevant information from database and shows it on the screen of agent.

This telephone system has re-enfranchised to fulfill the requirements of organizations in this digital age. It has become the part of IT infrastructure that delivers real time value to customers and organizations. End users can easily get response of their inquiries efficiently. Companies get flexibility by adding support of new office or home offices.  It works on the creation of virtual contact centres where customers can get helpline services anytime when they need. It also reduces software based solution, and maintenance charges. There is huge growth in this area where companies’ investments can gain profit in channels of interactions. It makes differentiation between services of customer care and wins the trust and satisfaction of customers.  CTI is the effective solutions for business firms as it helps them to increase output of sale easily.

Digital animations methodologies are used to present weather reports where you can easily make distinguish between models of reality and satellite photos. In television, you watch animated reconstruction of airplane or road and accidents. Computer generated images are the most popular examples of visualizations. Dynamic types of visualization are timelines and education that contains the potential to increase learning about system. The most effective category of visualization is existed between model based scientific and abstract visualization. The process of visualization displays complete conceptual constructs in form of 2D or 3D. These types of generated shapes are found in arbitrary structure.  Scientific visualization is performed with specialized software.

Some specialized programs are released in form of open source software that is used in academic environment. Many firms prefer to use proprietary software packages related to scientific visualization tools. Frameworks and models for creation of visualization include data model flow popularized by various systems like IRIS Explorer, AVS, data state models and VTK toolkit in spread sheet.

Here, I am presenting the use of different visualization applications that help you to understand the process of graphic animation thoroughly.

Scientific visualization

Visualization is the selection, transformation and representation of data from experiments or simulation with explicit geometric structure that is helpful for analysis, understanding and exploration of data. Traditional visualization forms are medical visualization, flow visualization, chemical visualization and astrophysical visualization.  Different techniques are used for the visualization of scientific data with direct volume and isosurface reconstruction.

Education visualization

Education visualization uses simulation created through computer for images. It is very useful for the teaching of such topics that are difficult to comprehend without visual presentation like atomic structure. You can also use it for past events like looking at human skeleton, dinosaurs without any mental harm.

Information visualization

Information visualization makes use of computer supported tools to discover abstract data. Information visualization applications are used in computer programs for the selection, representation and transformation of abstract data that help human interaction for better understanding and exploration.

Knowledge visualization

Knowledge visualization concentrates on the improvement of knowledge transfer with use of computer and non computer visualization methods. Examples of visual formats are diagrams, sketches, images, interactive visualization, information and imaginary visualization. In knowledge visualization, there is use of computer support tools to drive knowledge and new insights of knowledge. It aims to transfer experience, insights, values, perspectives, expectation, predictions and opinions with the use of complementary visualization.

Product visualization

Product visualization includes visualization software technology for manipulation and viewing of 3D models, documentation and technical drawings. It is the key of product life cycle management.

Visual communication

Visual communication is used for the transfer of ideas through visual display. It includes art, signs, alphanumeric, and electric resources.

Visual analytics

Visual analytics concentrates on human interaction for the process of data analysis. It is defined as the science of analytic reasoning. It concentrated on support for cognitive operation that help used to discover unexpected complex data

The uses of visualization technologies are used in almost all fields of life that help people to fulfill their perspective needs easily.

Multimedia Applications

Multimedia has become an essential source of communication in industry and education sectors. Any type of information that you get from any source, can be divided in multimedia from magazine to television, movies to web pages and text to video. Multimedia is the effective force that is used for information and entertainment.Advertising is the major sector that makes use of multimedia to transfer information and message to mass. For example, text or radio can prove an efficient way to promote products with the use of multimedia techniques. Today, multimedia education is very beneficial to teach varieties of subjects. Human beings learn quickly using five senses like hearing, sight, taste, touch etc. A lecture that contains pictures, text, and videos can help students to retain and learn information more effectively.

Multimedia and the Future

In this digital age, there are varieties of new media technologies that form a complete multimedia experience. For example, virtual reality provokes the sense of touch with audio and video media to motivate an individual into virtual world.

Two applications categorized as multimedia networks are video and VoIP. These techniques need some considerations at the time of network design. When you design network to accommodate the feature of multimedia, it should be managed adequately. It provides acceptable services to end users. It is not simple to manage multimedia network where you need to slap on some particular tools for monitoring, performance management and efficient delivery of message. There is need of special management in depth with some effective strategy for a stable functionality. The process of management in depth starts from element managements that are based on telemarketing network devices. All these devices help you to monitor the performance of the network.

News channels and business organization prefer to use multimedia network to deliver their message in audio and visual format that posses a long lasting impression in their memory. For example, it is easy to remember something from picture and images than text. Therefore, many sale and marketing firms use multimedia network for the introduction and promotion of their products. It creates a desire of usage among customers and they show interest to these products. The charges of these networks are quite low as compared to other traditional advertising methods.  We can say that organization need multimedia network for their products sales and promotion.  Distance learning is also successful due to these multimedia networks.

Structured external attacks:

These types of threats originate from a group of malicious people or organization. These types of network attacked are performed by such individuals who think premeditatedly on the actual losses and damages. There is need to implement access control procedures, detection system and hacking tools.

Unstructured external threats: These types of attacks are attempted by inexperienced attackers. A script kiddie is the type of terminology that is related to inexperienced attacker. They use cracking or scripted tools on the web to invade the system of target source.

Internal threats: Internal attacks are performed by unhappy or dissatisfied contractors or employees. These attackers have access to the system and try to steal information from normal process. These hackers have administration privileges on the network. You can easily block these types of attack through intrusion detection system that configure these attacks both from internal or external.

Point to remember:

There are some core components that you need to remember when you design network security infrastructure for your organization.

• Network attack detection.
• Network attack prevention.
• Network attack recovery
• Network attack isolation.

Identification of entry point

You should need proper scanning programs to trace all entry point of hackers into the internal network. You need to take assistance of skilled ethical hacker to identify these security points.

Penetration tests

If you run some type of penetration tests, it will help you to identify possible vulnerable points that can be easily accessed both internal and external users. It will help you to thwart attacks from multiple external sources.

Configure firewalls

It is essential to configure firewall otherwise it will act like open door for any hacker. You must configure firewall in accordance to the security aspect of your firm.
Password policies

It is good habit to set strong password policies so that hackers cannot guess it easily. You need to compose password based on numeric and alpha characters.
You also need to install good antivirus software and some other security measures to protect your network from hacker’s attacks.

There is incredible increase of malware, threats and vulnerabilities by email. These threats are found in form of worms and Trojans that can seriously affect the performance of your system. Most of these threats are sent in hidden file extension that is unable to understand for common users. The common use of email in all matters of life has given hackers a way to distribute threats and vulnerabilities in the internet. It is very easy for hackers to circumvent the security implemented through firewalls. Emails are used to install worms and Trojans at your firm to get confidential information and control over your services. Instructive virus can easily infect your computer through email.

Companies fail to acknowledge the risk of crucial data stolen within their network set ups. Staff usually sent such emails that contain offensive, sexist and racist material. Such type of emails can make your firm vulnerable in the eyes of public.

Malicious attachment and contents

Loveletter and Mellissa are such type of viruses that illustrate infection with attachments and contents of emails. They send such emails with the use of trust that exists between colleagues and friends. These viruses become active when a user opens attractive attachments named as me.pif and sexpic.

Email triggering

Virus known as Class ID allows hackers to hide the real extension of the file. They conceal the file extension of cleanfile.jpg that is a nasty html file. Another worm named as Nimda circumvents various email security tools and breaks up corporate networks and servers. It enters computer in form of vulnerable version of outlook express and internet explorer.

HTML mail

These days, there is widespread use of html email that includes active contents and scripts. These embedded scripts allow code and programs to execute on client computer. Some viruses based on html scripts can easily add to your machine when mail is opened. It is useless to trust on email security regarding attachment check.  B virus and BadTrans virus combined with html, try to propagate your system with malicious infection.

Why anti-virus software or a firewall is not enough

Some firms install firewalls and antivirus software for security. It is an effective way for the protection of intranet. However, firewalls cannot check the contents of email that is sent and received by authorized users. It shows that email threats and vulnerabilities can easily pass through your security system. In the same manners, virus protection software cannot protect all email attacks.

Solution:

Multi-tier security system is needed to tackle complex security issues. You need to implement content orientated and communication countermeasures like firewall, antivirus, intrusion, anti-spam, IM/P2P and web content filtering both at branch offices and head quarters of your firms. It will form a family of multi-layered security appliances. It is essential to set countermeasures in form of software that fit for fixed and mobile endpoints like laptops, desktops and smart phones. Applications related to specific software gateways provide customize and advanced protection for email and web hosting. These are some effective counter measures for the security of your organization that will save you from various threats and vulnerabilities.

Detecting And Stopping Network Attacks

A network attack is the type of malicious attempt to damage the security of network. There are many reasons of hackers attack on corporate networks. These network attacks are referred as hackers or crackers attacks. Various malicious and hackers activities are as follow:

• Illegal use of user’s privileges and accounts
• Steal of software code
• Steal of hardware
• Execution of code to damage current system
• Execution of code to corrupt and damage data
• Modification of store data
• Attempts to deplete bandwidth and network resources

The reasons of attacking on networks

Some people want to seek some sort of fame through their action of crashing websites. There are some possible motives that invoke them for network attacks.

• Politics
• Terrorism
• Industrial espionage
• Greed
• Criminal payoffs
• Racism

There are four types of network attacks that include:

• Internal attacks
• External attacks
  • Unstructured attacks
  • Structured attacks

It is a common and free tool for Linux system. Firestarter can easily fulfill the need of your firm whether you install it for the protection of personal workstation or a large network. It works like first line of protection against network vulnerabilities and attacks. It combines needs of both operating system administration and Linux desktop users. It is open source software that you can download free of charge. There are some potential features of firestarter firewall.

• Easy to use, user friendly, graphical interface
• A guiding set up wizard for first time firewall users
• Suitable for servers, desktops and gateways
• Internet connection sharing with DHCP service
• Easy to define outbound and inbound policy
• View of real time firewall events
• Tuning features for advanced Linux kernel events

Zorp GPL

It is a proxy firewall of new generation because its architecture is built to fulfill the security demands of current age. It uses script languages, application level proxies, and components based approach to define policy decision. It allows you to override client actions and monitors encrypted traffic. It also provides you power to implement local security policy. The features Zorp GPL firewall is as follows:

• Analyze sub protocol
• Utilize gateways of modular applications
• There is option of add/remove packet filter on the choice of user
• If nation version is not visible there, you can write proxy modules in Python

Turtle

Turtle is another common firewall that lets you realize the working process of Linux firewall in simple and fast way. It works on kernel 2.4 where you can easily define various firewall elements and enable the services of different groups. The features of turtle firewall are as follow:

• Definition of filter rules based on service
• Definition of new services
• Network address translation
• Hosts, groups, networks and zones definitions

LutelWall

It is an effective and high-level Linux firewall tool that uses easy and human readable configuration set up. It allows LutelWall administration that builds simple and single firewalls.  The features of LutelWall are as follow:

• Support for external and internal interfaces
• Control over traffic
• East to implement DNAT
• Support related to user-defined protocols
• Block of IP protocols scan
• TCP SYN protection
• Easy to set up on all distributions

Floppyfw

It is the router of advanced firewall-capabilities that works on single floppy disk. It provides you access list and advanced routing information to handle security issues. You need to install 386 network interface cards, 12 MB ram and 1.44 MB floppy drive to maintain it on the system. Some features of this firewall include:

• Simple packaging system
• Support for serial or consol port
• DNS cache and Server for internal network

These are some common names of free firewalls that you can download in accordance to their features and requirements.

Data communication is essential part of networking that develop a comprehensive understanding of networking concepts. While searching data communication books, you need to search such books that contain subjects like applicable across environments, area networks, OSI model, modems, wireless connection and wired. Such topics will help you to learn about new network technologies. You can find William Stalling book “Data Communication” quite helpful to cover all these topics.

Another book that can develop comprehensive knowledge about networking concepts is internetworking technologies. It is written for the help of networking students that covers various topics including data compression, TCP/IP, video, network management, routing, internet programming and security.

Network management and design is another important issue for the networking students. Cisco is the reliable name that will provide all types of guidance and help to students about network management. You can download Cisco books relating to network management issues that will develop comprehensive understanding about these topics.

Today, wireless network is the demand of every business or personal customer. Networking students also need to learn wireless networking concepts if they want to survive in the market. They should read such books that explains you information of how to manage and build wireless network, and Wi-Fi technologies.

Wi-Fi guide is the effective book that contains topics like wireless network formation, wireless communication security, and maintenance of home WLAN. It also contains material about antenna, wardriving, and other advanced topics.

In the book, Wi-Fi install and configure, you will find basics of Wi-Fi networking and their maintenance in 300 pages. The study of this book will save you from industrial hype as there is advice on reliable equipment selection. Students can easily learn of how to configure Wi-Fi connections on Macintosh, windows, and PDAs. Chapters on the wireless and Wi-Fi security or network troubleshooting help inexperienced networkers on these topics.

Besides, network formation and network management, network security is the essential part for the successful maintenance of network. You need to select such network security books that cover various topics like security implementation, password security, data security, and other issues.

These books will develop a good understanding among networking students. You need to select these books in accordance to your expertise and skills. First, you should learn about basic network terminologies before learning to advanced level.

Cooling: Server equipment and network accessories create much heat and they are liable to set down at extreme heat. Try to manage an effective cooling system like air conditioning unit before the set up of any type of enterprise network structure.

Wireless: Wireless network is known as WiFi network where you need to select the standard of wireless such as .11a, 802.11b, 802.11g, or 802.11h in accordance to the needs of the network. There are some new standards of these wirelesses that provide high transfer speed and quick access. The wireless standard should be selected on the base of fat or thin client base.

Overwire:  In many buildings, wired is placed above the ceilings and then these wires are dropped on the walls. It is recommended to double drop the wire at the time of drop because wire installation requires high cost of labor.  If you want to give network connection everywhere, you need to use two drops wire. It is performed when you annex the network devices. It is wise to install network drop when you try to anticipate the diagnostic equipment as it will facilitate the future interface requirements.
Electricity: It is good practice to hire the services of the certified electrician for the installation of your network servers and circuit. Common wire Cat 5 e has either T568B or T568A standard, select anyone and install same wire in the entire network enterprise infrastructure.  The Cat 6 wire is the new standard and a bit expensive but it will provide you reliability and redundancy in the transfer of data. Use fiber optic for long distance as this cable can transfer more information and low chance of disturbance. However, fiber optics is very expensive and you need to install it where there is need of connection between remote offices. Copper wires are installed for the telephone communication, as the closet of these wires does not contain long segments that are limited to hundred meters only.

Wide area network is the right solution if you want to create connection between remote offices. You can hire the services of your local ISP services provide for the access of wide area network.

Network Topology:

There are different types of network topologies like star or bus topologies. However large enterprise network infrastructure prefers centralized or distributed network topology in accordance to the set up of their organizations. In Centralized approach, it is easy to maintain security and control over users’ access.

Local Phone Service: It is better to hire the services of technicians for the implementation of technological offering in your area. Some important things include point to point, T1 lines, metropolitan network and some others. You need to resolve all these issues to local phone company.
Fiber Backbones:  Local utilities can easily maintain fiber backbones that are essential for the access of high speed bandwidth among offices.

The cost of enterprise network infrastructure proves lower in new building because you can set up wire system and other network design in accordance to your requirements. Whatever you want, it is better to take in review all these points so that you can set up a successful network infrastructure.