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.
Learn via our Video Courses
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.
Identify the total versions of IP.
Identify the first network which was based on TCP/IP protocol.
Choose among the following, which is the most common internet protocol.
What does TCP/IP stand for?
Which of the following layer isn’t present in the TCP/IP model but is included in the OSI model?
What is the collection of the hyperlinked document on the internet known as?
What is the location of a resource on the internet given by?
Identify the incorrect network topology,
Choose the port number of FTP.
What is the length of the IPv4 address?
What is the length of the IPv6 address?
What is the term used when the main server sends mail to another mail server?
What is the port number of SMTP?
What does MIME stand for?
What does port number 143 refer to?
Identify among the following the network device used to connect two dis-similar types of networks.
Identify the device used to boost up a weak signal.
What does MAC stand for?
What is the length of the MAC address?
Which of the following is used to allocate and manage resources for a network?
The arrangement where all data pass through a central computer is known as
What of the following device is used in the network layer?
Identify if the following statement is True or False: Network Interface Card(NIC) is an I/O device.
What is required to use a Simple Network Management System?
Identify the major difference between SNMPv3 and SNMPv2.
Identify the network which extends a private network across a public network.
Identify the layer which is responsible for data translating.
Identify the layer which determines the interface of the system with the user.
Which of the following topology arrangements is a point-to-point line configuration?
Identify the device which links two homogeneous packed broadcast local networks.
Why are parity bits used?
Identify among the following which belongs to class A.
What does LAN stand for?
Who keeps the private key in asymmetric key cryptography?
Calculate the maximum efficiency of pure ALOHA at G = 0.5?
Identify the switching method in which the message is divided into small packets.
What is a proxy server also known as?
Choose the correct formula for the total vulnerable time value of pure ALOHA.
Choose among the following which is a bit-oriented protocol.
