Functions of OSI and TCP/IP Layers Q.35
Consider three IP networks A, B and C. Host HA in network A sends messages each containing 180 bytes of application data to a host HC in network C. The TCP layer prefixes a 20 byte header to the message. This passes through an intermediate network B. The maximum packet size, including 20 byte IP header, in each network is
A : 1000 bytes
B : 100 bytes
C : 1000 bytes
The network A and B are connected through a 1 Mbps link, while B and C are connected by a 512 Kbps link (bps = bits per second).
- Option : B
- Explanation : Ignoring errors, i.e. noise, we have
B = 2 H (Nyquist theorem)
= 354.5 kbps
