Now, it's time to check your knowledge. Select the best response, and then check your answers with those in Assessment:

1. On a LAN, the _____ layer uses the MAC address of the destination machine, rather than the IP address.
   1. Network
   2. Presentation
   3. Data link
   4. Transport

2. The opcode lists what operation the sender is executing. Although there are many, the most common opcodes are _____.
   1. 10 and 12
   2. 0 and 8
   3. 7 and 8
   4. 1 and 2
3. With _____, a client requests its IPv4 address from a computer network by using its MAC address.
   1. InARP
   2. RARP
   3. Gratuitous ARP
   4. Proxy ARP
4. The _____ is an unsolicited ARP used to prevent duplicate IP addresses on a network. No reply is expected.
   1. InARP
   2. RARP
   3. Gratuitous ARP
   4. Proxy ARP
5. An ARP_____ is a large number of ARP requests that creates a DoS attack and prevents the network from functioning normally.
   1. Storm
   2. Spoof
   3. Gratuitous
   4. Inverse