Conference Topic: You are a Data Link
Assume that you are a synchronous data link that is processing a packet (or set of characters) from the network layer. Show the packet (or set of characters) that you receive, and then the data or information frame that you send to the physical layer. You may be a BSC (character-oriented) data link, or a HDLC (bit-oriented) data link.
1) Identify the type of data link that you are
2) Give the incoming data from the network layer
3) Give the outgoing frame to the physical layer
OR - You can be the receiving data link for another student's frame and:
1) Identify the type of data link that you are
2) Give the incoming frame from the physical layer
3) Give the packet (or set of characters) that are sent to the network layer.
For the BSC message use "Header" and "BCC" in the appropriate places.
For the HDLC frame,
use "11111111" as the address field,
"01111111" as the control field, and
"10101010 01010101" as the frame check sequence field.
Also be sure to include at least one sequence of 5 or more 1s in the data field.
Response:
You are a Data Link
by Theresa L. Ford on 10-09-2004
1) Identify the type of data link that you are
BSC
2) Give the incoming data from the network layer
| telnet | DLE | SPACE | anguish.org:2222 |
3) Give the outgoing frame to the physical layer
| SYN | SYN | SOH | HEADER | DLE | STX | telnet | DLE | DLE | SPACE | anguish.org:2222 | DLE | ETX | BCC |