COMPUTER NETWORKS (CS6004) HOME ASSIGNMENT 128W1A05F3 Q1. A system has an n-layer protocol hierarchy. Applications generate messages of length "M" bytes. At each layer, an "H"-byte header is added. What fraction of the network bandwidth is filled with headers?
ANS:
Message length = M bytes Header length = H bytes Protocol layers = n Header bytes per packet = aH Total bytes per packet = M+aH Fraction of bandwidth filled with header= aH / ( M+aH) If the packets were fragmented it would result in a larger fraction of the bandwidth filled with header information since fragments would have to replicate header information. So this extra header information would increase message overhead. Q2. Research the terms IEEE, IAB, IETF, IRTF, ANSI, EIA, RFC and describe their importance ANS: IAB (The Internet Architecture Board): It is the Internet Society overseer of the technical evolution of the Internet. The IAB supervises the Internet Engineering Task Force (IETF), which oversees the evolution of TCP/IP, and the Internet Research Task Force ( IRTF ),which works on network technology.
IEEE (Institute of Electrical and Electronics Engineers): It was formed in 1963 when AIEE merged with IRE. IEEE is an organization composed of engineers, scientists, and students. The IEEE is best known for developing standards for the computer and electronics industry. In particular, the IEEE 802 standards for local-area networks are widely followed. IEEE 802 project which defines popular network technology.
A set of network standards developed by the IEEE. They include:
IEEE 802.1:-Standards related to network management.
IEEE