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300-410 Practice Question: Configures BGP on router R4: router bgp 65004 bgp…
A network engineer configures BGP on router R4:
router bgp 65004
bgp router-id 4.4.4.4
neighbor 10.4.4.3 remote-as 65003 neighbor 10.4.4.3 password BGPsecret
!
What is the effect of the password command?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It enables MD5 authentication for the TCP session; the neighbor must also have the same password.
The password command enables MD5 authentication for the TCP connection between BGP peers. Both peers must have the same password; otherwise, the session will not establish.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It encrypts the BGP updates using the password as a key.
Why it's wrong here
MD5 authentication protects the TCP connection, not the BGP updates themselves.
- ✓
It enables MD5 authentication for the TCP session; the neighbor must also have the same password.
Why this is correct
The password command enables TCP MD5 signature option, requiring both sides to match.
- ✗
It sets a simple password that is sent in clear text with each BGP update.
Why it's wrong here
The password is not sent; it is used to compute an MD5 hash.
- ✗
It has no effect unless the neighbor is configured with the same password.
Why it's wrong here
It has an effect: the session will fail if passwords do not match, but it does enable authentication.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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