CCNA Training Blog

In the Class C address only 8 bits are available to define the host part in the address. In this class the subnet bit starts at the left and go to right. The Class C Subnet mask can be following-

Binary form               decimal form

10000000                   128

11000000                   192

11100000                    224

11110000                    240

11111000                    248

11111100                    252

There are lots of question arise when subnetting a network like how many valid subnet, how may host per subnet, what is the broadcast id for each subnet etc.

In Class C network we can take an example like-

Network Address is- 192.168.10.0

Subnet Mask- 255.255.255.192

Now the question are-

1. How many subnet we can [...] Continue Reading…

Algorithm is commonly used to determine the best route to forward the traffic to the destination. An algorithm used by the particular routing protocol is responsible for maintaining the routing table. Different routing protocol uses different algorithm and process to add a route in a routing table, send updates to remote router and for path determination dicision.The algorithm defines the following process-

1. It defines the mechanism for sending and receiving the routing information.

2. It defines the mechanism for calculating the best path and adding routes in the routing table.

3. It defines the mechanism for detecting to topology changes.

Characteristic [...] Continue Reading…

The router adds the remoter network to the routing table by configuring the static routes or configuring the dynamic route. When the router learn about the remoter network and the interface through which the packet send to the remote network, it adds the information of that router in the routing rable.A static route include the network address and subnet mask of the remote network with the ip address of the next hop router or the exit interface. Static router is denoted as S in the routing table.

When to use the static routing in the router to reach the destination-

1. [...] Continue Reading…

A routing table is a data file in a RAM that is used to store route information about directly connected and remote networks. A routing table contain network or next hop information that tell a router that a particular router representing the ‘next-hop’ on the way to the final destination. A routing table is viewed as a table format that determined where the data packet to be directed in the network to reach the destination network.
A routing table contains the necessary information to forward the packet along the best path and each packet contains the information about its source [...] Continue Reading…

A successor is neighbor router that is used to forward the packets and is the least–cost route to the destination network.Feasible distance is the lowest calculated metric to the destination.This is listed in the routing table entry.

In EIGRP,DUAL converges quickly after the topology changes and uses the backup path to other router known as feasible successor.A feasible successor is a neighbor which provides the loop free path to the same network as the successor.

The successor,feasible distance and feasible successor placed with their reported distance in its EIGRP topology table and this can be display by this command-

Router # show [...] Continue Reading…

When in end – to –end connectivity is in problem and the device are not pinging to each other. When there is a change in the network connectivity, then administrator should find the way to resolve the problem. There are some commands that help a lot in troubleshooting-

‘Ping’ command

Ping is stood ‘Packet internet Gropher’.It is a command by which we can check whether the particular host is reachable or not in the network. This command is work by sending the ICMP echo request and listing echo request reply. We use ping command to check the connectivity of my system [...] Continue Reading…

There are several ways to verify and troubleshoot RIP v2.The basics troubleshooting for RIP v2 are-

-Make sure that all the links are up and working.

-Check the connectivity of each cable.

-Make sure that all interfaces configured with correct IP address and subnet mask.

-Remove the configuration commands that are no longer necessary.

1. ‘show ip route’ command-

This command is used to check the network convergence and shows all the routes entered in the routing table.

Router# show ip route

2. ‘show ip int brief’ command-

If any network is missing in the routing table, we can check the interface by this command whether all are [...] Continue Reading…

All the basic router configuration commands are stored in the running configuration file. The running configuration file is stored in RAM. To verify all the basic command of running configuration we use the show running-config command -

Router# show running –config

After using this command the running configurations is entered in RAM, it is must  save the running configuration file into NVRAM.to show the configuration next time when router is bootup or resart,saving command into NVRAM is-

Router# copy running-config startup-config.

The show running-config command displays the current running configuration that is stored in the RAM and the show startup- config command, displays [...] Continue Reading…

After configure the interfaces and routes on the router it is must to verify the route. The command is use for verify the route-

Router# show ip route

This command shows the routing table of the router. Some of the content of the routing table-

C-show the directly connected network

S-show the static route

I-show the protocol IGRP

R-show the protocol RIP

D-show the protocol EIGRP

O-show the protocol OSPF

B-show the protocol BGP

A routing table is used to store routing information from different sources. The main purpose of a routing table is to provide paths to the router to different destination networks. The routing table consist a [...] Continue Reading…

The online guides are the best way to achieve to your goal. Online CCNA training guide will help you to get pass in your CCNA exams.

CCNA guides:

CCNA guide is designed basically to provide introductory level knowledge about Cisco hardware and system networking as well. This guide will help you to learn about how networking function run on Cisco routers. With worldwide acceptable free CCNA guides, you can easily qualify for a job. But to impress your employer, only CCNA certification will not be sufficient. You must have to gain the absolute knowledge of wide area networks and local [...] Continue Reading…