Submarine Cables in India

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

cisco gold partners in india

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

BT India Private Limited





Career in networking


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:

“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.


CCNAX online Training

We provide ?ccnax online Training

Interconnecting Cisco Networking Devices Part 1 (ICND1) v1.1

Our Course content for

  • How networks function, network components, and the OSI reference model
  • Binary, decimal, and hexadecimal numbering
  • Switching operations and theory
  • Host-to-Host packet delivery process through a switch and through arouter
  • TCP/IP network addressing and routing
  • IP subnetting
  • Providing Local Area Network (LAN), Wide Area Network (WAN), and remote access services
  • How Wireless LANs (WLANs) work, including the latest IEEE 802.11nstandard
  • Introduction to Cisco Internet Operating System (IOS)
  • Configuration of Cisco Routers and Catalyst Switches
  • Using your router as a Dynamic Host Configuration Protocol (DHCP) server and/or client and to provide Port Address Translation (PAT) functionality
  • Network discovery and management using Cisco Discovery Protocol (CDP), Link Layer Discovery Protocol (LLDP), Telnet, secure shell (SSH), and TrivialFTP (TFTP)
  • Expand a switched network from a small to medium network environment
  • Issues with redundant switching
  • Spanning Tree Protocol (STP)
  • Concepts of VLANs and trunking and routing between VLANs
  • Implementing VLSM
  • Configure, verify, and troubleshoot OSPF and EIGRP
  • Determine when to use access control lists (ACLs) and how to configure,verify, and troubleshoot them
  • Configure NAT and PAT
  • Configure IPv6 addressing and Routing Information Protocol new generation(RIPng)
  • VPN solutions
  • Configure PPP, CHAP, and PAP
  • Frame Relay operation and troubleshooting

CCIE R&S Books list

CCIE R&S Reading List

This page lists books on topics appearing on the CCIE Written and Lab Exam.? These books are not required study resources, however, they can be used to build knowledge in certain areas.

Many of the Cisco Press books are available to certified individuals and Cisco customers at prices discounted up to 30% off. To check for discounts, visit the?Cisco Marketplace, click on (Cisco Press) Bookstore, and login with your Cisco CCO ID. Search for the titles using the ISBN number indicated.

  • CCIE Routing and Switching Exam Certification Guide
  • CCIE Routing and Switching Exam Quick Reference: Exam 350-001 v3.1 (Digital Short Cut)
  • CCIE Routing and Switching Practice Labs (Digital Short Cut)
  • CCIE Routing and Switching v4.0 Troubleshooting Practice Labs
  • Routing TCP/IP, Volume 1
  • Routing TCP/IP, Volume II (CCIE Professional Development)
  • Troubleshooting IP Routing Protocols
  • Inside Cisco IOS Software Architecture (CCIE Professional Development Series)
  • Cisco LAN Switching (CCIE Professional Development series)
  • Cisco OSPF Command and Configuration Handbook (paperback)
  • Cisco BGP-4 Command and Configuration Handbook
  • Cisco Field Manual: Router Configuration
  • Cisco Field Manual: Catalyst Switch Configuration
  • Developing IP Multicast Networks, Volume I
  • Internet Routing Architectures
  • MPLS and VPN Architectures
  • MPLS and VPN Architectures, Volume II
  • Cisco Catalyst QoS: Quality of Service in Campus Networks (paperback)
  • End-to-End QoS Network Design: Quality of Service in LANs, WANs, and VPNs
  • Deploying IPv6 Networks
  • Network Security Technologies and Solutions (CCIE Professional Development Series)

The following titles are no longer for sale in print format, but are available for free online view at the InformIT Reference Library:

1. CCIE Practical Studies, Volume I

2. CCIE Practical Studies, Volume II

3. Troubleshooting Remote Access Networks

4. Troubleshooting VPNs

ccnax training in india

List of Careers in Networking

List of Careers in Networking

Network Administrator

Network directors supervise the computers within the company’s system. They manage and make sure the network runs swimmingly and uninterrupted. They connect all hardware and code and originated all programs, like everyone’s email, to the pc system. They work with individual users, troubleshoot crashes associate degreed slow performance and ar answerable for developing an emergency back-up system to preserve essential knowledge. they need to record all system errors and the way they were repaired. they need to additionally originated security measures to stay unauthorized users from accessing company files. The administrator monitors however every laptop is getting used and by whom.

Network Systems Engineer

Network systems engineers ar answerable for putting in place the network infrastructure the administrator oversees. Engineers maintain and check into the protection systems the administrator originated, and work with them to develop firewalls and back-up systems to the most network server. Engineers ar answerable for the configuration of the network, maintaining all the instrumentation and work any maintenance performed. The engineer is that the fine tuner to the network system.

Network Programmer/Analyst

Network laptop programmers ar administrative-style jobs that make and style important knowledge structures for every laptop. They analyze the system’s code necessities, develop new applications and maintain existing ones. they’re there from begin to end on all laptop applications. They virtually tell the pc what to try and do and the way to know the knowledge it’s given. The coder should meet all system standards, making the right codes and communicate well with excellent understanding. Programmers should even have exemplary presentation skills.

Network Systems Manager

Network systems managers guide, manage and supervise the complete web and machine operation. Managers ar responsible of the geographical point, assign comes and programs to their workers and provides reports to higher management. they’re answerable for every department within the operation to incorporate several programmers, analysts and technologists. they need to be educated in each space of the pc network system. Managers should make sure the convenience of every department’s instrumentation, order and allot resources as necessary and be accustomed to trade developments and additional.

Network Service Technician

Network service technicians establish and fix network troubles. They troubleshoot elements and hardware like homocentric and fiber-optic cables. they need to have in depth information in web connections and in linking computers at intervals a network. They set up and analyze price for the company’s electronic network system and confirm correct layouts, configurations and affiliation devices. they need to be abreast on trendy nomenclature and be able to resolve any downside at intervals the pc system.

Contact us for?Cisco?training , currently we provide best ccna training in?Chandigarh.

Null Interface

What is a Null Interface ?

By?Atul Sharma

What is a Null Interface ?

Null interface is not a physical interface. Its a virtual interface where you can route traffic, but want packets destined for a particular network to be dropped. Directing packets to the null0 interface will prevent the router from sending an Internet Control Message Protocol (ICMP) network unreachable message when it receives a packet with an unknown destination. A situation in which you might want to use the null0 interface is when you have configured a default network, but want packets destined for a particular network to be dropped.

If a static route is configured for the network to the null0 interface, the packets will be dropped without the ICMP message or without having to configure an access list. This interface is always up and can never forward or receive traffic; encapsulation always fails. The null interface provides an alternative method of filtering traffic. You can avoid the overhead involved with using access lists by directing undesired network traffic to the null interface.


Introduction to Null Interface

Null interfaces are completely software-like logical interfaces. Null interfaces are always up. However, they can neither forward data packets nor have IP addresses and link layer protocols configured on them. With a null interface specified as the next hop of a static route to a specific network segment, any packets routed to the network segment are dropped. Null interface provides you a way to filter packets. That is, you can simply transmit unwanted traffic to a null interface rather than applying ACLs.

For example, by executing the?ip route-static null 0?command (which configures a static route leading to a null interface), you can have all the packets destined to the network segment discarded.

Configuring a Null Interface

Follow these steps to configure a null interface:

To do?

Use the command?


Enter system view



Enter null interface view

interface null 0


Null0 interface is the default null interface on a switch. It can neither be created nor removed.

Configure a description for the null interface



By default, the description of a null interface is its interface name followed by the word?interface, for example,?Null0 Interface.

Display information about the null interface

display interface null?[??]