Now it's time to check your knowledge. Select the best response, and then check your answers, which can be found in the Assessment:

1. Class selector 6 in the DiffServ field is used with _____.
   1. Signaling
   2. Broadcast video
   3. Network control
   4. Realtime
2. The IP address 172.18.23.119 is a
   1. Class C IPv4 address
   2. Class B private IPv4 address
   3. Class E IPv4 address
   4. Class D private IPv4 address

3. An IPv6 address has _____ bit.
   1. 32
   2. 48
   3. 64
   4. 128
4. In IPv4, we use a TTL value that indicates the number of hops it can take when traveling through the network. In IPv6, this field value is called _____.
   1. Router pass
   2. Class stop
   3. TTL
   4. Hop count
5. An IPv4 header has _____ flags.
   1. 1
   2. 2
   3. 3
   4. 4