Introduction To Computer Network
Are you feeling nervous about SEBA Class 10 Computer Science? Chapter 1, all about networks, can seem like a tangled mess of wires and confusing terms. But fear not, friend! This guide will help you understand how computers chat and get you ready to rock your exams!
What is a Computer Network?
A computer network is a collection of interconnected computers and devices that are capable of sharing data, resources, and information. The primary purpose of a computer network is to facilitate communication and collaboration among different devices, allowing them to exchange data and share resources efficiently.
Table of Contents
What are the types of computer networks?
There are several types of computer networks, and they can be categorized based on their size, geographical coverage, and purpose. Here are some common types:
Local Area Network (LAN): A LAN is a network that operates within a limited geographic area, such as a single building, office, or campus. It enables devices to share resources like files and printers locally.
Wide Area Network (WAN): WANs cover larger geographic regions, connecting multiple LANs across cities, countries, or even continents. The internet itself is a prime example of a global WAN.
Metropolitan Area Network (MAN): MANs bridge the gap between LANs and WANs, connecting various buildings within a city. They offer connectivity on a city-wide scale.
Personal Area Network (PAN): A PAN is a small network designed for personal devices within an individual’s proximity, such as linking a smartphone to a laptop via Bluetooth.
Why hostname should not be used to identify a computer in a computer network?
A hostname should not be used to identify a computer in a computer network because hostnames can be changed easily, either intentionally or unintentionally. This means there’s no guarantee of a one-to-one relationship between a hostname and a specific device. Also multiple devices on a network can have the same hostname, leading to ambiguity and potential communication errors.
How many 16 port switches required to connect 31 computers in a network?
If we use 16-port switches and each switch can connect 16 computers, we would need at least two 16-port switches to connect 31 computers in a network.
FILL IN THE BLANKS:
1. The hostname command is used to display _____.
Ans: Name of the computer.
2. The length of a IPv4 and a IPv6 is ____ and___.
Ans: 32 bit & 128 bit.
3. An access point is used to connect _____.
Ans: Wireless network.
4. The ping command is used to verify ____.
Ans: The connectivity between two computers.
5. HTTPS transfer ______ data.
Ans: Encrypted.
MULTIPLE CHOICE QUESTIONS:
1. Which device is required to connect multiple heterogeneous networks?
- (A) Hub
- (B) Switch
- (C) Router
- (D) Access Point
Ans: (C) Router.
2. Which is the largest type of computer network?
- (A) PAN
- (B) LAN
- (C) MAN
- (D) WAN
Ans: (D) WAN.
3. Which protocol transfers encrypted data instead of plain data?
- (A) HTTP
- (B) HTTPS
- (C) FTP
- (D) SMTP
Ans: (B) HTTPS.
4. How many bytes are reserved for OUI in a MAC address?
- (A) 3
- (B) 8
- (C) 24
- (D) 12
Ans: (C) 24.
5. IP address can be automatically assigned if the network is connected with
- (A) Access Point
- (B) Mail Server
- (C) Web Server
- (D) DHPC Server
Ans: (D) DHPC Server.
