easyMultiple ChoiceObjective-mapped
300-410 Practice Question: In IPsec site-to-site VPN, what is the purpose of…
In IPsec site-to-site VPN, what is the purpose of the 'match address' command under a crypto map?
⚠ Common exam trap
Cisco often tests the distinction between 'match address' (traffic selection) and 'set peer' (tunnel endpoint), leading candidates to confuse the purpose of these two commands under a crypto map.
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 identifies the traffic that will be encrypted and sent through the tunnel.
The 'match address' command under a crypto map references an access list (ACL) that defines which traffic should be protected by IPsec. When a packet matches a permit entry in that ACL, it triggers the IPsec process to encrypt and tunnel the traffic to the remote peer. This is the fundamental mechanism for selecting interesting traffic in a site-to-site VPN.
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 specifies the peer IP address for the tunnel.
Why it's wrong here
The peer is specified with the 'set peer' command, not 'match address'.
- ✗
It defines the encryption and authentication algorithms.
Why it's wrong here
Those are defined in the transform set.
- ✓
It identifies the traffic that will be encrypted and sent through the tunnel.
Why this is correct
The ACL defines interesting traffic; only that traffic is protected.
- ✗
It sets the lifetime for the IPsec SA.
Why it's wrong here
Lifetime is set with 'set security-association lifetime' or globally.
Visual reference
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.