Computer Networks And Internet Protocol - Week 1 | Assignment 1 [Jan 2023]

Computer Networks And Internet Protocol - Week 1 | Assignment 1 : Answer with Explanation

Computer networks and internet protocols are essential components of today's technology-driven world. They allow devices to connect and communicate with one another, enabling the sharing of information and resources. Multiple choice questions (MCQs) on this topic test a student's understanding of the various concepts and protocols involved in computer networks and internet communication. These include topics such as Introduction to Computer Networks,Network Protocol Stack ,Data Networks – from Circuit Switching Network to Packet Switching Network ,Services at the Different Layers of the Protocol Stack , Application Layer I – Different Protocols at the Application Layer

Which of the following is/are true with respect to Bridge?
i) Also called “smarter hub”
(ii) It filters network traffic based on MAC address

a. Only (i)
b. Only (ii)
c. Both (i) and (ii)
d. Either (i) or (ii)

Answer

c. Both (i) and (ii)
A bridge is a networking device that connects multiple network segments together. It is used to filter network traffic based on the MAC address, which is a unique identifier assigned to each device on a network. This allows the bridge to forward data packets only to the specific devices that need to receive them, rather than broadcasting them to all devices on the network. This improves network performance and reduces network congestion. Bridge is also sometimes called a “smarter hub” because it can filter traffic based on MAC addresses, while a traditional hub simply broadcasts all incoming traffic to all connected devices.

When does Email become a reality?

a. 1965
b. 1977
c. 1989
d. 1976

Answer

b. 1977 b. 1977
Email was first developed in the early 1960s, and the first email system, called Mailbox, was implemented at Massachusetts Institute of Technology (MIT) in 1965. However, it wasn't until 1977 that the first widely used email system, called Simple Mail Transfer Protocol (SMTP), was introduced. This system allowed for the sending of email between different computer systems and networks, which made email a reality for the general public.

Bridges filter network traffic based on IP address.

a. True
b. False

Answer

b. False

Which layer collects a stream of bits into a frame?

a. Physical Layer
b. Network Layer
c. Data Link Layer
d. Session Layer

Answer

c. Data Link Layer:
Collects a stream of bits into a larger aggregate called a frame

What is socket address?

a. Combination of port and IP address
b. Combination of MAC and IP address
c. IP address only
d. None of this

Answer

a. Combination of port and IP address
- A socket address is the combination of an IP address and a port number.
- A network socket is an endpoint of a connection across a computer network.
-The socket address for a particular socket on a particular host is unique
- We can use getsockname() on the socket for a specific connection (which you get from accept() ) in order to find out which local IP address is being used on that connection.

Which of the following is/are example(s) of Application Layer protocols of OSI model?

a. FTP
b. UDP
c. TCP
d. DNS

Answer

ANS: a and d
There are various types of protocols for the Application layer. Some major protocols are as follows;
- HTTP (Hypertext Transfer Protocol) for web communication
- HTTPS (HTTP Secure) for secure web communication
- FTP (File Transfer Protocol) for file transfers
- SMTP (Simple Mail Transfer Protocol) for email communication
- DNS (Domain Name System) for resolving domain names to IP addresses
- Telnet for remote command-line access to systems

Which of the following is/are true with respect to Transport Layer?
(i) It is responsible for process-to-process communication
(ii) It provides a standardization for common type of packet exchanges

a. Only (i)
b. Only (ii)
c. Both (i) and (ji)
d. Either (i) or (ii)

Answer

a. Only (i)
Transport Layer
– Implements a process-to-process channel
– Unit of data exchanges in this layer is called a message
Application Layer
– Standardize common type of exchanges

Switches break up collision domain.

a. True
b. False

Answer

a. True
- Switches only “switches” frames from one port to other within a “switched network”
- Switches break-up collision domains.
-Collision domain – Ethernet term ! – used to describe a network scenario in which one particular device sends a packet on a network segment, forcing other devices on the same segment to pay attention to it. At the same time, a different device tries to transmit, leading to collision, then both the devices must re-transmit – a situation found in a Hub
- Each and every port on a switch represent its own collision domain (Hub represents only one collision domain and only one broadcast domain)

What is the First search-engine?

a. Chrome
b. Internet Explorer
c. HotBot
d. Archie

Answer

d.Archie
1990- First search-engine (Archie)
- Archie was the first search engine. It was created in 1990 by Alan Emtage, a student at McGill University in Montreal, Canada. It allowed users to search for files on anonymous FTP servers.

Which OSI layer is also known as Medium Access control Layer or MAC layer?

a. Physical Layer
b. Application Layer
c. Data Link Layer
d. None of above

Answer

c. Data Link Layer MAC Layer Explained: The Top Sublayer Of Data Link Layer

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Computer Networks And Internet Protocol, Week 1 : Assignment 1,noc23_cs48