ITF - Quiz 9.4 - Packet Delivery and Forwarding

What is the purpose of the Internet Protocol (IP)?

• To insert IP datagrams into frames

• To map IP addresses to MAC addresses

• To deliver information at the physical/data link layer

• To address and forward between networks

What is a MAC address?

• An IP address assigned to the network adapter

• A 48-bit value expressed in hexadecimal notation

• An address used for local address discovery

• A hardware address or Media Access Control address

What is the purpose of the Address Resolution Protocol (ARP)?

• To forward packets to their destination

• To discover the MAC address of a destination host

• To determine the network ID of a destination host

• To cache IP:MAC address mappings

How does a host discover the MAC address of a destination host?

• By broadcasting ARP messages on the local network

• By forwarding the packet to a router

• By mapping the IP address to the hardware address

• By caching IP:MAC address mappings

What happens if the destination IP address is local?

• The host forwards the packet to a router

• The host uses ARP messaging to discover the local destination host

• The host broadcasts ARP messages on the local network

• The host caches IP:MAC address mappings

What is the role of a router in packet forwarding?

• To deliver the packet to its destination

• To discover the MAC address of the destination host

• To forward the packet to the default gateway

• To cache IP:MAC address mappings

How are frames addressed at the data link layer?

• Using IP addresses

• Using MAC addresses

• Using network IDs

• Using hardware addresses

What is the format of a MAC address?

• Six groups of two hexadecimal digits with colon separators

• Three groups of four hexadecimal digits with period separators

• A 48-bit value expressed in hexadecimal notation

• A 64-bit value expressed in binary notation

What is the purpose of caching IP:MAC address mappings?

• To minimize the number of ARP messages sent

• To discover the default gateway

• To determine the network ID of a destination host

• To deliver packets to their destination

What is the purpose of routing?

• To insert IP datagrams into frames

• To map IP addresses to MAC addresses

• To deliver information at the physical/data link layer

• To forward packets between networks