Which of the following examples of partial output of the show run command from R1 represents a correct configuration of PPP on R1?

Last Updated on August 7, 2021 by Admin 3

You are configuring a PPP connection between two routers, R1 and R2. The password for the connection will be poppycock. When you are finished you execute the show run command on R1 to verify the configuration.

Which of the following examples of partial output of the show run command from R1 represents a correct configuration of PPP on R1?

  • enable password griswald
    
    hostname R1
    
    username R1 password poppycock
    
    interface serial 0/0
    
    ip address 192.168.5.5 255.255.255.0
    
    encapsulation ppp
    
    ppp authentication chap
  • enable password griswald
    
    hostname R1
    
    username R1 password poppycok
    
    interface serial 0/1
    
    ip address 192.168.5.5 255.255.255.0
    
    encapsulation ppp
    
    ppp authentication chap
  • enable password griswald
    hostname R1
    username R2 password poppycock
    interface serial 0/0
    ip address 192.168.5.5 255.255.255.0
    encapsulation ppp
    ppp authentication chap
  • enable password griswald
    
    hostname R1
    
    username R1 password griswald
    
    interface serial 0/0
    
    ip address 192.168.5.5 255.255.255.0
    
    encapsulation ppp
    
    ppp authentication chap
Explanation:
The correct configuration is as follows:

enable password griswald
hostname R1
username R2 password poppycock
interface serial 0/0
ip address 192.168.5.5 255.255.255.0
encapsulation ppp
ppp authentication chap

The key settings that are common problems are as follows:

– The username is set to the hostname of the other router (in this case, R2)
– The password is set poppycock which must be the same in both routers

The following set is incorrect because the username is set to the local hostname (R1) and not the hostname of the other router (R2):

enable password griswald
hostname R1
username R1 password poppycock
interface serial 0/0
ip address 192.168.5.5 255.255.255.0
encapsulation ppp
ppp authentication chap

The following set is incorrect because the password is misspelled. It should be poppycock, not poppycok.

enable password griswald
hostname R1
username R1 password poppycok
interface serial 0/0
ip address 192.168.5.5 255.255.255.0
encapsulation ppp
ppp authentication chap

The following set is incorrect because the password is set to the enable password of the local router (R1) rather than the agreed upon PPP password, which is poppycock.

enable password griswald
hostname R1
username R1 password griswald
interface serial 0/0
ip address 192.168.5.5 255.255.255.0
encapsulation ppp
ppp authentication chap

Objective:
WAN Technologies
Sub-Objective:
Configure and verify PPP and MLPPP on WAN interfaces using local authentication

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