What is the difference between DTE & DCE???

ISDN, Wipro,

What is CSU/DSU & explain the function????

Cisco,

Write an access list line which will deny node 20.0.2.1 to anywhere on your network using DNS via UDP. Don't worry about the other access list lines.

You have OSPF traffic flooding your network via one of your router interfaces. Write the access list line that will deny all ospf traffic. Don't worry about the other lines of the access list.

How to see the running-config & startup-config infor from global configuration mode. As we know, from priviledge mode we cn see it by executing command. i.e. Router#show running-config and Router#show startup-config Now wat is the coommands use in global configuration mode o see those info. Router(Config)# ??????

Juniper Networks,

You want to clear the outputs on your serial interface showing errors on the interface. Which command do you type?

Which command will show you if you have a DTE or DCE cable connected to an interface?

DFSS,

Write out a config to permit only the below MAC address to pass traffic through a port on your switch. mac-address 0005.1b00.5b58

Hi Guys I am facing one problem while configuring PAP over Point to Point links. Configuration scenario is like this. ROUTER 1: (Hostname – R1) R1(config)#username R2 password CCNA2 R1(config)#interface serial 1/1 R1(config-if)ip address 10.0.0.1 255.0.0.0 R1(config-if)#lock rate 64000 R1(config-if)#encapsulation ppp R1(config-if)#ppp authentication pap R1(config-if)#ppp pap sent –username R1 password CCNA1 R1(config-if)#no shutdown ROUTER 2: (Hostname – R2) R2(config)#usename R1 password CCNA1 R2(config)#interface serial 1/1 R2(config-if)#ip address 10.0.0.2 255.0.0.0 R2(config-if)#encapsulation ppp R2(config-if)# ppp authentication pap R2(config-if)# ppp pap sent –username R2 password CCNA2 R2(config-if)#no shutdown Now problem is that, after configure the command “ppp authentication pap” the “Line protocol” status goes down on each router. But when I disable this command using “no ppp authentication pap”, the “Line Protocol” status goes up. What could be the problem, can anyone explain it plzzz….!!! Thanks in Advance…!! Shahin..

Port selection is done at which layer of OSI reference model?????

What is the difference between RIP & RIPng???? Can anyone explain it..!!! Thank u in advance.

What is the meaning of PASSIVE interface in RIP, IGRP, EIGRP & OSPF?? Can any one explain..!!!

What is the difference between OSPF Exteral Type 1 (O E1) & External Type 2 (O E2) routes????

Can anyone explain the Split Horizon rule in RIP & also Split Horizon with Poison reverse. Jitu.... U knw wat i expect.. hehehehehe...

What are the difference between IPv4 & IPv6?? Can anyone explain more details about it..!!

HCL,