Unit-1
Unit:3
Unit:5
- Write short notes on
:Protocol Architecture.
- Discuss
TCP / IP protocol layer architecture and functions in detail.(**)
- Write
short note on (c) Line
Configuration.-5
- List and
explain transmission impairments.
- Write short notes on any two of the following:
(a)
Pulse code modulation and delta modulation.
- Compare
the three basic modulation techniques for transforming digital data into
analog signals. (5)
- What
is pulse stuffing? Explain how it is helpful in design of TEDM. (5)
- (b)
Explain the concept of Delta Modulation.***
- (a)
Draw the wave forms and explain the following coding schemes:
(a)
Bipolar-AMI (ii) Differential Manchester
- Explain
Data Communications Interfacing with neat diagrams.
- Explain
about Amplitude modulation and Angle modulation. 10
- Differentiate
between Amplitude shift keying, frequency shift keying and phase shift
keying. (4)
- Write about on error
detecting and one error correcting codes. Explain with examples.
- Elaborate On data
transmission techniques.
- Explain
the Transmission modes, transmission characteristics and categories of
applications of optical fiber. . (5)
- Explain
the different phases of HDLC with suitable example. (5)
- What
are the topology options for Fiber channel?
- Explain
how the Go-Back-N Arq technique can handle different specific cases or
contingencies.
- Discuss
the mechanisms of sliding-window flow control.
- State
the purpose of ARQ and explain stop and wait ARQ.
- Explain
HD LC protocol in detail.****
- Explain
HDLC frame structure.
- Explain
in-detail Cyclic Redundancy Check (CRC) error detection technique with suitable
examples. 10
- Write
about Line-of-sight Transmission.
- A
channel has a data rate of 4 kbps and a propagation delay of
20 ms. For what range of frame sizes does
stop-and-wait give an efficiency of at least 50% ?
- Give architecture of ATM
and explain its logical connections and cells.
- Describe Frame relay.
- Elaborate on various
methods of multiplexing.
- Contrast
the architecture of a traditional telephone network circuit switch with
soft switch architecture. Explain how flexibility has been achieved in
soft switch architecture.
- Draw
the Event timing diagram to bring out differences between circuit
switching and packet switching.
- What
is the need for ATM adaptation layer? What are some of the protocols and
services provided by the AAL ? (10)
- What
are the characteristics of virtual channel convections?
- Draw
and explain the ATM cell format 5
- Explain
the concepts of packet switching and how routing is done in packet switching.
- Write
short notes on any two of the following:
- ADSL
- Explain
in detail about statistical time division multiplexing.
- Explain
in detail about xDSL.
- The difficult problem in the design of a synchronous time division multiplexer is that of synchronizing the various data sources.How can this problem be overcome? Explain with suitable example
- What are the advantages and disadvantages of Frame Relay over X.25 ?
- What are the different categories and types of services that can handled by ATM network
- Give a
comparison of the circuit switching, datagram packet switching and virtual
circuit packet switching Techniques.
Unit:4
Discuss
Ethernet and token ring by giving their frame formats. Explain the significance
of each field.
Differentiate
Ethernet and token ring.
(c) LANs. Transmission media.
(c) Layer 2 and Layer 3 switches
14. (a) Describe the operation of CSMAjCD.
(b) Write short notes on -virtual LANs.
(b) List various LAN topologies and explain the frame
transmission in each LAN
topology. .. 6
ExplainLANprotocolarchitecture.
Explainfunctionsof aBridge. 10
a)
Layer 2 switches,
14. (a) Write about layer 2 and layer 3 switches.
(b) Explain briefly about Gigabit ethemet.
16. (a) Explain key elements such as topology, medium access
control of LAN.
(I) Bridge protocol architecture (c) Fibre channel
topologies
Discuss cellular wireless networks of third generation systems.
Describe IEEE 802.11.
How medium access control is done is wireless LANs?
discuss the architecture and services defined by1 EEE
802.11.
Write short notes on any two of the following:
(a) Frequency hopping spread spectrum and direct sequence
spread spectrum.
(b) Typical call between two mobile users within an area
controlled
by a single MTSO.
Explain Bluetooth architecture.
16. a) Give overview of operation of cellular systems.
15. Write about IEEE 802.11 architecture and services.
17. Write short notes on any two of the following:
(a) HDLC
(b) xDSL
(c) Overview of cellular systems.
Draw and explain the 1EEE 802.11 MAC Frame Format. (3)
What are the advantages and disadvantages of using CDMA for
cellular network?
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