Networking 5

A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?

10 segments

Which scenario describes a function provided by the transport layer?

A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.

Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)

ACK SYN

Which two flags in the Layer 4 PDU header are set by a client and server to terminate a TCP conversation? (Choose two.)

FIN ACK

What is a function of the transport layer?

It segments data from the application layer into manageable pieces.

Which transport layer feature is used to guarantee session establishment?

TCP 3-way handshake

How does the transport layer provide end-to-end guaranteed data transmission?

TCP retransmits data whenever an ACK flag is not received.

A host begins a TCP session with a sequence number of 1000 and sends 10 segments of 1200 bytes each. The last acknowledgement the host receives has an ACK with a sequence number of 7001. What action will the host take next as part of the TCP session?

The host retransmits unacknowledged segments.

What happens if part of an FTP message is not delivered to the destination?

The part of the FTP message that was lost is re-sent.

How does a client computer determine what source port number to assign to a UDP header?

The port number is random within the range of dynamic port numbers.

Refer to the exhibit. A TCP segment was sent by PC1 to the web server via port 80. Because of an unexpected network failure, the data was forwarded by R1 but was not received by R2. Which statement is correct about this scenario?

The web server will not acknowledge this segment. The PC1 timer will expire and PC1 will resend the segment.​

Refer to the exhibit. In the partial Wireshark capture of a packet, which Layer 4 protocol is being used to send data?

UDP

Why is UDP well suited as the transport layer protocol for video applications?

UDP has low overhead.

Which type of applications are best suited to use UDP as the transport layer protocol?

applications that require minimal transmission delay

What protocol header information is used at the transport layer to identify a target application?

port number

What is a socket?

the combination of a source IP address and port number or a destination IP address and port number

During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?

the next byte that the destination expects to receive

Fill in the blank. The layer in the TCP/IP model that links the application layer to the internet layer is called the layer.

transport

What type of port number is assigned by IANA to commonly used services and applications?

well-known port