A group of computers that are connected to each other for the purpose of sharing resources is called a network.
Characteristics of computer networks:
- Resource sharing
- Communication speed
- Back up
- Scalability
- Reliability
- Software and hardware sharing
- Security
Network devices: HUB, Switch, Bridge, Gateway, Modem, Router, Repeater, etc
Network Types
- PAN - Personal area network. It is mainly for personal use.
- LAN - Local area network. It is used in offices, buildings.
- MAN - Metropolitan area network. Use: Within the city
- WAN - Wide area network. Use: Used for countries or all around the world.
Advantages of networking:
- Open to everyone
- FIle sharing
- Security
- Easy to add a new device
- Backup and storage
Disadvantages
- Network device required.
- Virus attack
- Requires handler
- High-speed internet
- Server
Types of Protocol
- TCP/IP
- HTTP
- SMTP
- POP
- IMAP
- UDP
- PPP
- FTP
OSI Model
- OSI stands for “Open system interconnection model”. It has been developed by standard ISO.
- It is a seven-layer architecture where each layer has specific functionality.
- All these 7 layers work collaboratively to transmit the data from one network to another across the globe.
The seven layers are:
- Physical layer
- Datalink layer
- Network layer
- Transport layer
- Session layer
- Presentation layer
- Application layer
Additional Resource
Computer Network MCQs
What does PoP stand for?
Real-Life Problems
Prep for Target Roles
Custom Plan Duration
Flexible Plans
What is the port number of PoP?
What is the number of layers in the OSI model?
The full form of OSI is?
Identify the layer which provides service to the user.
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What is a HUB?
What does a set of rules define?
Real-Life Problems
Detailed reports
Identify among the following which is mainly used to host web site.
Identify the full form of HTTP?
Identify the protocol primarily used for browsing data.
What is the length of the MAC address?
What does port number 143 refer to?
What does TCP/IP stand for?
What is a proxy server also known as?
What is required to use a Simple Network Management System?
What is the collection of the hyperlinked document on the internet known as?
What is the length of the IPv4 address?
What is the length of the IPv6 address?
Why are parity bits used?
What is the location of a resource on the internet given by?
What is the port number of SMTP?
What is the term used when the main server sends mail to another mail server?
What of the following device is used in the network layer?
Which of the following is used to allocate and manage resources for a network?
Which of the following layer isn’t present in the TCP/IP model but is included in the OSI model?
Which of the following topology arrangements is a point-to-point line configuration?
Who keeps the private key in asymmetric key cryptography?
Calculate the maximum efficiency of pure ALOHA at G = 0.5?
Identify the first network which was based on TCP/IP protocol.
Choose among the following which is a bit-oriented protocol.
Choose among the following, which is the most common internet protocol.
Choose the correct formula for the total vulnerable time value of pure ALOHA.
Choose the port number of FTP.
Identify among the following the network device used to connect two dis-similar types of networks.
Identify among the following which belongs to class A.
Identify if the following statement is True or False: Network Interface Card(NIC) is an I/O device.
Identify the device used to boost up a weak signal.
Identify the device which links two homogeneous packed broadcast local networks.
What does MIME stand for?
Identify the incorrect network topology,
Identify the layer which determines the interface of the system with the user.
Identify the layer which is responsible for data translating.
Identify the major difference between SNMPv3 and SNMPv2.
Identify the network which extends a private network across a public network.
Identify the switching method in which the message is divided into small packets.
Identify the total versions of IP.
The arrangement where all data pass through a central computer is known as
What does LAN stand for?
What does MAC stand for?
