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Month: April 2013

Submarine Cables in India

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There are now 9 Submarine Cables in India, with three respectively in Mumbai and Chennai, and each in Cochin,?Tuticorin and Digha. Submarine cables in India Tata Communications owns three cable landing stations, each in Mumbai, Chennai and Cochin. Reliance Globalcom owns the Versova Cable Landing Station in Mumbai. Bharti Airtel owns three cable landing stations, … Read more

CROSSOVER CABLE VS STRAIGHT CABLE

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CROSSOVER CABLE VS STRAIGHT CABLE Hello Everyone , ?today we discuss about the cables used in LAN network . we have many devices in a network , like routers , switches , hubs , pc’s , but which cable is used to connect those devices Category 5 cable?(Cat 5) is a?twisted pair?cable?for carrying?signals. This type … Read more

AAA Lab in Packet Tracer

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AAA Lab in Packet Tracer

Lab Objective : any one try to Telnet the router must be authenticated through AAA server First and in case AAA server is down , routers will use his local user accounts database.

Configuration on the router:

=setting telnet=

Router (config) #enable secret 1111

Router (config) #line vty 0 4

Router (config-line) #login authentication default ?( to apply an on Telnet lines )?

Router (config-line) #login

Router (config-line) #exit

Router (config) #username JKR password 3333

=AAA commands=

Enable AAA on the router :

Router (config) #aaa new-model

Set authentication for login using two methods , method 1 uses AAA server through Tacacs+ protocol , method 2 using local router user accounts:

Router (config) #aaa authentication login default group tacacs+ local

Tell the router what is the IP address for Tacas+ server and key (password) to connect to:

Router (config) #tacacs-server host 11.0.0.2 key 8888

Configuration on AAA server

ACS SERVER

User account :

Username : JKR

Password: 4444

tacas+ client : 11.0.0.1

Key : 8888

Now here is few show commands we can use plus one command to unlock any user account reach max failed attempts to logon:

Router#show AAA user all

Router#show AAA sessions

Router#show a local user lockout

Router#clear a local user lockout username all

In best practice try to Telnet the router with local username Yasser password 3333 and it will not work then try to use? the ACS server user name we wrote above : audio password 4444 and it will work fine .

Now disconnect the ACS server or just remove the cable and try to Telnet the router using Yasser and it will work fine .

Remember method 1 fail , you will not go to method 2

But if method 1 is not available then you can go to method 2 and use it.

cisco gold partners in india

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You can apply job in these ?companies and they will pay your Cisco certification expenses.

BT India Private Limited

ACCENTURE SERVICES PVT.LTD

HCL COMNET LTD.

DIMENSION DATA INDIA LIMITED

WIPRO LTD

Career in networking

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Job Titles

Several types of positions exist in networking, each with different average salaries and long-term potential, and one should possess a clear understanding of these. Unfortunately, job titles in networking, and in Information Technology (IT) generally, often lead to confusion among beginners and experienced folks alike. Bland, vague or overly bombastic titles often fail to describe the actual work assignments of a person in this field.

The basic job titles one sees for computer networking and networking-related positions include

  • Network Administrator
  • Network (Systems) Engineer
  • Network (Service) Technician
  • Network Programmer/Analyst
  • Network/Information Systems Manager
The Network Administrator

In general, network administrators configure and manage?LANs?and sometimes WANs. The job descriptions for administrators can be detailed and sometimes downright intimidating! Consider the following description that, although fictitious, represents a fairly typical posting:

NETWORK ADMINISTRATOR – HOBO COMPUTING
“Candidate will be responsible for analysis, installation and configuration of company networks. Daily activities include monitoring network performance, troubleshooting problems and maintaining network security. Other activities include assisting customers with operating systems and network adapters, configuring routers, switches, and firewalls, and evaluating third-party tools.”

Needless to say, a person early in their career often lacks experience in a majority of these categories. Most employers do not expect candidates to possess in-depth knowledge of all areas listed in the job posting, though, so a person should remain undeterred by the long, sweeping job descriptions they will inevitably encounter.

Comparing Roles and Responsibilities

The job function of a?Network Engineer?differs little from that of a Network Administrator. Company A may use one title while Company B uses the other to refer to essentially the same position. Some companies even use the two titles interchangeably. Firms making a distinction between the two often stipulate that administrators focus on the day-to-day management of networks, whereas network engineers focus primarily on system upgrades, evaluating vendor products, security testing, and so on.

A?Network Technician?tends to focus more on the setup, troubleshooting, and repair of specific hardware and software products. Service Technicians in particular often must travel to remote customer sites to perform “field” upgrades and support. Again, though, some firms blur the line between technicians and engineers or administrators.

Network Programmer/Analysts?generally write software programs or scripts that aid in network analysis, such as diagnostics or monitoring utilities. They also specialize in evaluating third-party products and integrating new software technologies into an existing network environment or to build a new environment.

Managers?supervise the work of administrators, engineers, technicians, and/or programmers. Network / Information Systems Managers also focus on longer-range planning and strategy considerations.

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