DCA6204 MCA ADVANCED COMPUTER NETWORKS

Description

SESSION	MARCH 2024
PROGRAM	MASTER of CoMPUTER APPLICATIONS (MCA)
SEMESTER	II
course CODE & NAME	DCA6204– Advanced Computer Network
CREDITS	4
nUMBER OF ASSIGNMENTS & Marks	02 30 Marks Each

 

 

 

Set-Ist

 

1. a. Compare and contrast the OSI model with the TCP/IP reference model, highlighting their similarities and differences in terms of layering and functionality.

Ans:

The OSI (Open Systems Interconnection) model and the TCP/IP (Transmission Control Protocol/Internet Protocol) model are two foundational frameworks used to understand and implement network protocols. Both models use a layered approach to standardize and explain the functions of a network system.

Here is a detailed

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1. Discuss the differences between Ethernet and Token Ring LAN technologies, focusing on their architectures and access methods.

Ans:

Key Differences

1. Access Method:

• Ethernet: Uses CSMA/CD to manage access to the network medium, leading to potential collisions and retransmissions.
• Token Ring: Uses token passing to manage access, ensuring that only one device transmits at a time,

 

 

2. a. Explain the concept of Multiplexing. How does Wavelength Division Multiplexing (WDM) differ from Frequency Division Multiplexing (FDM)?

Ans: Multiplexing is such a technique, which allows multiple transmission sources to share a larger bandwidth. The two common forms of multiplexing are frequency division multiplexing (FDM), time division multiplexing (TDM) and wavelength division multiplexing (WDM). Frequency division

 

 

1. Explain in detail the different types of network topology used in computer networks.

Ans:

Based on the geometric representation of all the links and linking devices there are four basic topologies are possible:-

 

Mesh network topology

 

This network topology is one which a node not only captures and broadcast its own data, but also serves as a relay for other nodes that is, it must collaborate to propagate the data in the network. Each node connected with a dedicated point-to-point link with every other node. To ensure a network is following

 

 

3. a. Explain the Internet Protocol (IP) and Transmission Control Protocol (TCP)

Ans:

Internet Protocol (IP):-

Definition

• Internet Protocol (IP) is a network layer protocol responsible for addressing and routing packets of data from the source to the destination across multiple networks.

Key Features

1. Addressing:
   • Each device

 

 

1. Explain the operation of Circuit Switching and Packet Switching. Discuss the advantages and disadvantages of each

Ans:

Circuit Switching

Operation

• Dedicated Path:
  • In circuit switching, a dedicated communication path or circuit is established between two nodes (sender and receiver) before data transmission begins. This path remains reserved for the duration of the communication session.
• Connection

 

Set-IInd

 

4

1. Describe the operation of BGP in inter-domain routing. How does BGP differ from intra-domain routing protocols like OSPF and RIP?

Ans:

Operation of BGP in Inter-Domain Routing

Border Gateway Protocol (BGP) is the protocol used to exchange routing information between different autonomous systems (ASes) on the internet.

Here’s an overview of its operation:

1. Establishing BGP Sessions:
   • BGP routers, known as BGP speakers, establish a TCP connection on port 179 to

 

b.

Explain the concept of Integrated Service Digital Network (ISDN). How does Basic Rate Interface (BRI) differ from Primary Rate Interface (PRI)?

Ans:

Integrated service digital network is the digital version of circuit switched analog telephone system. But we have had switched system and telephones for a long time. So my question is: “What is new in ISDN?” It includes multimedia to handles data, voice, images and video. To add more it is not only a technology for multimedia communication, but it is an empowering technology that allows

 

 

5. a. Discuss the operation of the Simple Network Management Protocol (SNMP) in network management. How does SNMPv3 enhance security compared to SNMPv2?

Ans: Operation of the Simple Network Management Protocol (SNMP)

SNMP is a protocol used for network management, allowing administrators to manage network performance, find and solve network problems, and plan for network growth.

Here’s a detailed look at its operation:-

1. Architecture:

 

1. Describe the ATM protocol architecture. How are virtual channel connections established in ATM networks?

Ans: ATM protocol architecture ATM is a technology that has the potential of revolutionizing data communications and telecommunications. Based on the emerging standards for Broadband Integrated Services Digital Networks (B-ISDN), ATM offers the economically sound “bandwidth on demand” features of packet-switching technology at the high speeds required for today’s LAN and WAN networks. ATM is a streamlined protocol with minimal error and

 

 

6 a. Discuss the requirements for Web Security and the role of Secure Socket Layer (SSL) in ensuring secure communication over the Internet.

Ans: Requirements for Web Security

Web security involves safeguarding websites and web applications from various threats to ensure the confidentiality, integrity, and availability of data.

Key requirements for web security include:-

1. Confidentiality:
   • Encryption: Protect sensitive data transmitted between users and web servers from being

 

 

1. Explain the principles of Cryptography and discuss the differences between Symmetric Key Encryption and Public Key Encryption. How does the RSA algorithm ensure secure communication?

Ans: Principles of Cryptography

Cryptography is the science of securing communication and data by transforming it into a form that is unreadable to unauthorized users. The fundamental principles of cryptography include:

1. Confidentiality:
   • Ensures that information is accessible only to those authorized to view it. This is achieved through encryption, which transforms plaintext into ciphertext.
2. Integrity: