Review Questions
| 1. | What components or mechanisms of a link state protocol can an attacker target? |
| 2. | In what way does the fact that IS-IS is not itself an IP protocol give it a security advantage over OSPF? |
| 3. | What is “fightback” behavior? |
| 4. | Why is simple password authentication less desirable that MD5 authentication? |
| 5. | What is a message digest, and how does it protect the keys used for authentication? |
| 6. | What is the benefit of the OSPF Key ID? |
| 7. | What is the purpose of the OSPF cryptographic sequence number in MD5 authentication? |
| 8. | In what way is IS-IS more vulnerable to replay attack than OSPF? |
| 9. | What three authentication scopes are defined for IS-IS? How do the three scopes differ in regard to the carrying of the Authentication Information TLV? ... |
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