Network Layer
data link header
destination host logical address
the Layer 2 source and destination address
buffer header in simple words is the location number where the buffer contains are stored and header contains address of it...
destination host address
The destination host address
Source and destination IP address
The source and destination IP address can be identified.
DLCI
DLCI
Internet Protocol, or IP, puts a header on every packet that it sounds out. This header is the overhead. All protocols, such as TCP or UDP, will put a header on the packet. The IP header contains information such as source IP address and destination IP address and is used by routers to figure out where to send the packet. ex. you send your friend a 1kb file, but it takes up 1.5kb of bandwidth due to overhead
Overhead. The packet header contains no useful data - at least, not useful for the end-user; it is of course very important to maintain the protocol functioning, for instance, the destination address is necessary in order to be able to send the packet to the correct destination.