Cisco Chapter 9

Question 1

The pieces of communication in UDP are called?

Answer 1

datagrams

Question 2

These datagrams are sent as best-effort by the transport layer protocol. UDP has a low overhead of ….. bytes.

Answer 2

8

Question 3

Conversation Multiplexing

Answer 3

segmenting the data into smaller chunks enables many different communications, from many different users, to be interleaved (multiplexed) on the same network.

Question 4

UTP

Answer 4

Fast
low overhead
not need for acknowledgement
does not resend data
deliver data as it arives

Question 5

TCP

Answer 5

reliable
does need acknowledgement data
resends data
deliver data in sequence order

Question 6

Source Port (16 bits) and Destination Port (16 bits) - Used to identify the application.
Sequence number (32 bits) - Used for data reassembly purposes.
Acknowledgment number (32 bits) - Indicates data has been received and the next byte expected from the source.
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, which indicate the purpose and function of the TCP segment.
Window size (16 bits) - Indicates the number of bytes 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.

Answer 6

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