Use the network diagram. Following only the drawn links, which route from A to G uses the fewest hops?

On the diagram, a packet must travel from P to U. Which route follows the drawn links and has the fewest hops?

Refer to the diagram. Following only the drawn links, what is the shortest route for a packet from H to M?

A request starts at W and needs to reach Z in the shown network. Following only the drawn links, which path is shortest?

Look at the network. Following only the drawn links, which route takes the fewest hops from N to T?

Using the diagram and following only the drawn links, which is the shortest path from C1 to S1?

In the diagram, exactly one router can lose power and leave host G with no route to server S. Which router is it?

Study the diagram. Which router is a single point of failure for communication from H to S?

A packet travels between A and S in the shown diagram. Which router's failure would cut off A from S completely?

Use the network diagram. If one router fails, which one would make it impossible for client C to reach server D?

According to the diagram, which router is the single point of failure between phone P and server V?

Examine the network. Which router's loss would leave host L with no remaining route to server K?

A video is divided into packets before leaving a streaming server. Besides a piece of video data, what information helps the receiver rebuild it correctly?

A packet contains part of a file and a header. Which header item tells routers where to forward the packet next?

Why can a receiver tell that packet 18 belongs after packet 17 in a transfer?

A packet carries a slice of an email. Which statement best distinguishes that packet from the email itself?

A computer sends a 24-megabyte file as many packets. What is the main purpose of splitting the file this way?

Which information is most useful to a receiving computer that needs to notice a missing piece of a TCP transfer?

A web page arrives as packets 1, 2, 4, 3, and 5. What should the receiving computer do?

Two packets from the same photo take different routes. Packet 40 arrives before packet 39. What does this show?

A receiver has packets numbered 1 through 100, but they arrive in a mixed order. What allows it to reconstruct the original file?

During a download, packet 12 arrives before packet 11. Which response is correct for a receiver using TCP?

Why is packet arrival order not a reliable way to determine the order of a song's data?

A receiver gets packets 7, 8, 10, and 11 from a TCP transfer. What is the best conclusion?

A TCP download sends 300 packets, and packet 156 is dropped. The download later completes correctly. What most likely happened?

A busy router drops one packet from a TCP file transfer. Which part of the network is responsible for noticing the loss and getting that data sent again?

Why does a lost packet not necessarily mean a user must resend an entire document?

In a TCP transfer, a sender does not receive confirmation for packet 72 within the expected time. What should it do?

A packet is lost while traveling, but later packets arrive. Which action best preserves the correct file?

A device reads a packet's destination IP address, chooses an outgoing connection, and forwards the packet toward another network. What device is it?

A school's network needs a device to move packets from its LAN toward websites on the wider internet. Which device performs that forwarding role?

A packet reaches a network junction. The device checks its routing table and sends the packet out the best available interface. What is the device doing?

Which device forwards data between computers on the same local network, such as the computers in one classroom, rather than between separate networks?

Each time a packet moves from one router to the next on its way to a server, what is that single step called?

Which task is a router most directly responsible for?

A backbone has two separate routes between City A and City B. One cable is cut, yet packets still travel between the cities. Why?

What network design feature improves fault tolerance when one router or link fails?

An ISP adds a second connection between two routing centers. What problem is this redundancy intended to reduce?

When a storm disables one route, packets are sent through another connected route. Which property of the network is being used?

One route between two regions is overloaded with traffic, while a second route between them is mostly empty. How do the redundant routes help?