Ten CCNA Questions and their answers

Which of the following would work at all layers of OSI model?   -   SNMP station, TCP, Transceiver ,Bridge ,Host, Switch , Web Server, Gateway

An SNMP station, Webserver, Host and a Gateway can read all layers of the OSI.

Which command would you type at the CLI prompt to see the configuration register settings ?

# show version

What is the benefit of segmenting your network with bridges ?

A benefit of segmenting your network with bridges is that some upper-layer protocols do not implement a network layer protocol such as NETBIOS or DLC. Bridges can create a network using these protocols.

You want to verify that your ISDN router has connected to the telephone ISDN switch. What command should you use?

# show isdn status   -   This command layer 1,2 and 3 status on an ISDN BRI interface.

Which of the following are causes of LAN traffic congesion ?

If you have too many hosts in a broadcast domain, or have broadcast storms or large amounts of multicasting, you will have LAN congestion.

How long is the flush timer in IGRP?

The flush timer in IGRP is 7 times the update timer = 7 x 90 = 630 sec

If you want to see whether an interface has an access list set, which command would you use?

#show ip interface   -   This command will show you whether an access list has been set and in what direction it is filtering.

What are the two ways that you can enter setup mode on a router ?

You could erase the contents of NVRAM by executing the command "erase startup-config" and then rebooting the router.

You can also type "setup" at the privileged mode at any time.

Which are the commands used to configure information into a RAM of a router ?

#configure terminal , #configure memory --> same as newer command #copy startup-config running-config and #configure network

If during the transfer stage of a TCP session, the window size changes from 1500 to 2000, what will the sending host do?

Transmit 2000 bytes before waiting for an acknowledgement.