IP Routing and Networking Quiz

What is the first step a host takes in IP routing when sending a packet to a remote host?

• Send it directly to the destination

• Perform DNS resolution

• Forward it to the default gateway

• Broadcast it to all devices

Which protocol is used by a host to find the MAC address of its default gateway?

• DNS

• DHCP

• ICMP

• ARP

A router processes an incoming frame only if:

• It has a broadcast MAC

• The FCS field passes and the frame is addressed to the router’s MAC

• The destination IP is on the same subnet

• The TTL value is greater than 1

If the FCS check fails on an incoming frame, what happens?

• The router logs it for review

• It is encapsulated again

• It is dropped

• It is forwarded anyway

What does a router do in the second step of processing a packet?

• Compares IP address to routing table

• Encapsulates the packet

• De-encapsulates the packet

• Updates its MAC table

What determines the router’s forwarding decision?

• Source IP address

• MAC address

• Destination IP address and routing table

• Port number

A router will forward a packet only after:

• Confirming source IP validity

• Encapsulating it in a new frame

• Checking TTL

• Verifying application layer data

Which data-link protocol is commonly used for point-to-point serial WAN links?

• PPP

• Ethernet

• Wi-Fi

• ARP

What is ignored in data-link addressing for point-to-point WAN links?

• IP address

• ARP

• MAC address

• Frame Check Sequence

In IP routing, which layer is responsible for delivering packets across networks?

• Data-link

• Transport

• Network

• Physical