Your address is 210.1.1.100 with mask 255.255.255.224. Which address labels the whole subnet?

• 210.1.1.100
• 210.1.1.127
• 210.1.1.96

A subnet mask splits an IPv4 address into which two parts?

• The sender part and the message part
• The network part and the host part
• The username part and the password part

A subnet mask marks which part of an address names the network.

A packet is headed outside its own network. Where does the device send it?

• Back to itself for safekeeping
• To the default gateway
• To any address it likes

A router sends 192.168.1.0/24 out on link A, 192.168.0.0/16 out on link B, and everything else out on link C. A packet for 192.168.1.20 arrives. Which link does it leave on?

• Link A
• Link B
• Link C

Two packets of one message always travel the same route.

Why does no router need a map of the whole internet?

• Each router only picks the next hop
• Packets carry a full map with them
• Routers never forward faraway packets

A router sends 192.168.1.0/24 out on link A, 192.168.0.0/16 out on link B, and everything else out on link C. A packet for 192.168.2.5 arrives. Which link does it leave on?

• Link C
• Link A
• Link B