Router Packet Forwarding

How does a router determine which interface to use to send a message to the destination network?

• By using a routing table

• By guessing the shortest path

• By sending to all interfaces

• By using the default gateway

What is the purpose of a routing table in a router?

• To store user data

• To determine the path for data packets

• To connect to the internet

• To manage user accounts

What does a router do if the destination network address is in the routing table?

• It discards the packet.

• It encapsulates the packet in a new frame to send it out.

• It sends an error message to the sender.

• It ignores the packet.

What happens if the wrong default gateway is specified in the host TCP/IP settings?

• Messages are encrypted

• Messages are delivered faster

• Messages cannot be delivered

• Messages are sent to the correct network

What is the function of the default gateway in message delivery?

• It encrypts messages

• It assigns IP addresses

• It ensures messages reach remote networks

• It increases network speed

Which of the following is not a valid IPv4 address in the diagram?

• 192.168.1.1

• 192.168.1.2

• 192.168.1.5

• 192.168.1.3

What is the common subnet mask for all PCs in the diagram?

• 255.255.255.0

• 255.255.0.0

• 255.0.0.0

• 255.255.255.255

What information in the IP packet does the router use to determine which interface to forward the packet?

• Destination MAC Address

• Source MAC address

• Destination IP address

True or false? If Host-A has an IP packet to send to Host-B, and Host-A has determined that Host-B is on a different network. Host-A will encapsulate the IP packet in an Ethernet frame with the destination MAC address of the its default gateway.

• true

• false

A default route is the interface through which the router forwards:

• all packets

• any packet when a host does not receive an ARP Reply

• a packet containing a source IP network address that is not in the routing table of the router

• a packet containing a destination IP network address that is not in the routing table of the router