6. OSPF Authentication

Question 1

What are the three types of authentication in OSPF?

Answer 1

• Type 0 = null
• Type 1 = Plain Text
• Type 2 = SHA or MD5

Question 2

At which levels can OSPF authentication be installed

Answer 2

• Link level (leading when activated)

- Process

Question 3

What is the command to turn on authentication on OSPF per link?

Answer 3

ip ospf authentication

Question 4

What is the command to turn on authentication on OSPF per process?

Answer 4

Process: area authentication message-digest
Link: ip ospf message-digest-key

Question 5

How can you check if authentication is active in OSPF?

Answer 5

show ip ospf interface

Question 6

When you have multiple OSPF Key IDs defined, which one is used?

Answer 6

The lowest key

Question 7

What is another name for Type 1 authentication in OSPFv2?

Answer 7

Plain Text and it is the default