As I understand from Tanenbaum's Computer Networking books, the unit exchange at the Data Link level is called a frame and the unit exchange at the network level is called a packet. What I don't really understand is do frames encapsulate packets or vice versa. Why?
Any help appreciated
2007-01-18 10:03:35 · 2 answers · asked by petre 1 in Computers & Internet ➔ Computer Networking
Packets consist of frames. Each frame has a specific purpose. One frame has the header information such as destination and return address. Another frame contains the data being exchanged - a login at Yahoo for example. Yet another frame may contain checksum information to ensure data integrity.
2007-01-18 10:13:09 · answer #1 · answered by Wire Tapped 6 · 0⤊ 0⤋
Layer 3 IP packets are broken up into layer 2 frames once they hit the LAN. Layer 2 frames use hex format mac addressess that look like 00ac.54ff.00ac. Layer 3 packets have IP address like 192.168.4.5. Layer 3 packets can go from one LAN (local area network) to another by using a router. A data frame can not leave its LAN.
2007-01-18 18:38:50 · answer #2 · answered by HomeSweetSiliconValley 4 · 0⤊ 0⤋