ITN 154 CH7

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 7.2.2 Reliability and Flow Control

example of socket

192.168.1.1:80

Fill in the blank using a number. A total of ____ messages are exchanged during the TCP session termination process between the client and the server.

3 7.2.1 TCP Communication

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 7.2.1 TCP Communication

During a TCP session, the flag is used by the __________ client to request communication with the server.

SYN 7.2.1 TCP Communication

TCP segment parts

Source prt, destination port Sequence number (32 bits) - Used for data reassembly purposes. Acknowledgement number (32 bits) - Indicates the data that has been received. Header length (4 bits) - Known as ʺdata offsetʺ. Indicates the length of the TCP segment header. Reserved (6 bits) - This field is reserved for the future. Control bits (6 bits) - Includes bit codes, or flags, that indicate the purpose and function of the TCP segment. Window size (16 bits) - Indicates the number of segments that can be accepted at one time. Checksum (16 bits) - Used for error checking of the segment header and data. Urgent (16 bits) - Indicates if data is urgent.

Protoclol Category of TCP, UDP and BOTH UDP AND TCP p

TCP - 3-way handshake, window size UDP - best for VoIP, connectionless Both UDP and TCP - port number, checksum

Which transport layer feature is used to guarantee session establishment?

TCP 3-way handshake 7.2.1 TCP Communication

What happens if the first packet of a TFTP transfer is lost?

The TFTP application will retry the request if a reply is not received.

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 NOT ENTIRE

Which entities are involved in a temporary communication that is established by the transport layer?

application

Which three fields are used in a UDP segment header? (Choose three.)

length, source port, checksum

Which two TCP header fields are used to confirm receipt of data?

sequence number acknowledgment number 7.2.2 Reliability and Flow Control

udp parts

source port, destination polrt length checksum application layer data