(ii) Write the similarities and differences between packet and cell switching.
(iii) Why is the data link layer in a LAN subdivided into Logical Link Control (LLC) and Medium Access Control (MAC) sub-layers ?
(iv) List the characteristics of broadband coaxial cable.
(v) Differentiate between virtual circuit and datagrams.
(vi) The maximum payload of TCP segment is 65,515 bytes. Why ?
(vii) What are sliding window protocols ? Explain one-bit sliding window protocol with an appropriate diagram.
Q.2. (i) Name all the basic network topologies and describe advantages of each. Draw proper diagram tor each topology.
(ii) Explain the following terms :
(a) Bandwidth
(b) Channel capacity
(c) Multiplexing
(d) Quality of Service (QoS)
(e) Full-Duplex Transmission
(iii) What is the basic purpose of MAC layer protocol ? Explain the
function of following MAC layer protocols :
(a) Ethernet
(b) Token bus
Q.3. (i) Describe the characieristics and application or the following
network devices :
(a) Routers
(b) Bridges
(c) Switches
(ii) Answer the following :
(a) Explain ISDN BRI Services.
(b) Differentiate between broadband and baseband services.
(c) Describe the following three fields of TCP header :
(l) Sequence number
(ll) Data offset
(lll) Urgent pointer