DCCN PRE-FINAL IMP QUESTIONS.

 1.      Discuss the functions of various layers of OSI Model and compare with TCP/IP model

2.      a) Compare ADSL,VDSL,HDSL and SDSL Technologies.

b) Compare circuit switching and packet switching.

3.      a) What are the functions of the Data link layer? Explain stop and wait protocol.

b) Briefly explain ALOHA,CSMA,CSMA/CD,CSMA/CA protocols and compare its performances.

4.      a) Explain Architecture ,layers  and frame format of SONET.

b) Compare frame relay and ATM networks.

5.      What is logical addressing? Give the services and header format of IPV4 and compare with IPV6.

6.       a) Explain the main categories of DNS Messages.

 b) Explain briefly about ICMP.

7.      Explain the following

            a) Electronic mail        b) Voice over IP                      c) HTTP

            d) FTP                           e) Remote login.

8.      a)  Compare TCP,UDP and SCTP protocols.

b) What is congestion and explain any one of the congestion control mechanism.

DCCN II MID IMPQUESTIONS

II MID IMPORTANT QUESTIONS.

1.      a)  Compare TCP,UDP and SCTP protocols.

b) What is congestion and explain any one of the congestion control mechanism

2.      What is logical addressing? Give the services and header format of IPV4 & compare with IPV6.

3.     a) Explain DNS in the Internet.

b) Write short notes on Remote login & FTP.

4.      Explain the following

a)      ICMP  b) IGMP          c) Multi-cast routing protocols

d) Forwarding & routing  e) Inter-networking.

5.      a) Explain the main categories of DNS Messages and its header format.

                  b) Explain briefly about ICMP.

6.      Explain the following

                        a) Electronic mail        b) Voice over IP                      c) HTTP

                        d) FTP                           e) Remote login.

7.      Give the frame format of IPV4 and explain the functions of each.

8.      Describe the procedure used for Checksum calculation in IPV4.

9.      Discuss ICMP message & IGMP messages and its formats.

10.  Explain and compare various techniques used to improve QOS.

11.  Explain SMTP and POP3 protocol.

12.  Explain the working of 3-ways handshaking used in TCP.

13.  What is congestion? Explain the causes and the effects of congestion.

14.  Explain the integrated Services QoS model.

15.  Explain the name-address and address-name resolution process.

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DCCN VIVA & SHORT ANSWER QUESTION'S

DCCN VIVA & SHORT ANSWER QUESTION'S-1
DCCN VIVA & SHORT ANSWER QUESTION'S-2

Five health benefits of rope skipping

                                             Skipping is one of the simplest, easiest and zero-cost workouts. It can be done anytime, anywhere even in the comfort and convenience of your home. Besides being an effective aerobic exercise it is fun too. So grab that rope and give it a shot. The following reasons are sure to motivate you:

Major health benefits of jumping rope:
1. Aids weight loss
Skipping can help you shed up to 450 calories in just 30 minutes.The effort it takes to jump rope for 10 minutes is the equivalent of running a mile in eight minutes. So, you see how effective is skipping rope for losing weight.
2. Promotes cardio-vascular fitness
Skipping rope leads to better cardio-respiratory improvements, making the heart stronger and allowing it to pump more blood, delivering oxygen and nutrients to your tissues.
3. Improves muscle tone
Regular skipping improves the muscle tone in the legs and lower body and also in the upper body as your shoulders and arms work the rope.
4. Fights osteoporosis
Skipping boosts a person's bone density, helping to keep off osteoporosis.
5. Improves balance and coordination
Skipping regularly improves body flexibility and also aids your coordination and balance.It also helps you gain better concentration as both sides of your brain remain active while skipping.