Frames
What is the data link protocol responsible for?
NIC-to-NIC communications.
What do frame fields contain?
Frame start and stop indicator, addressing, type, control, data, error detection.
What is another word for physical addresses?
Data link layer addresses
What are Common WAN protocols?
Point-to-Point Protocol (PPP), high-Level Data Link Control (HDLC), frame relay, asynchronous transfer mode (ATM), X.25
What is different about the data links encapsulation process?
Appends information in the form of a trailer at the end of the frame.
When is the trailer added to each frame?
During error detection.
Where is data link layer addressing contained?
frame header
LAN typically uses what kind of bandwidth?
High bandwidth
What are the 3 basic layers of the data frame?
Header, data, and trailer.
What does CRC stand for?
Cyclic Redundancy Check
How is the physical address different from Layer 3 logical addresses?
The physical address is unique to the specific device unlike with Layer 3 logical addresses which does not indicate on what network the device is on
The cost of the long-distance physical links and the technology used to carry the signals over those distances result in what?
low bandwidth capacity.
In a fragile environment what is needed to ensure delivery?
more controls
What contains the frame load?
Data
What is the 3 kinds of Layer 2 and Layer 3 addresses?
Host to router, router to host, router to router.
What are the data link layer protocols include?
Ethernet, 802.11 wireless, point-to-point protocol (PPP), high-level data link control (HDLC), frame relay