State the need for computer networks.

State the need for computer networks. 
by

1 Answer

Answer :

Need for computer network:

 File/Folder Sharing

 Hardware Sharing (Resource sharing)

 Application sharing

 User Communication (Email, Remote Access)
by

Related questions

Explain four features of computer networks.

Description : Explain four features of computer networks.

Last Answer : A computer network is interconnection of two or more computers connected to each other so that they can exchange information such as e-mail, messages or documents, or share resources such as disk storage or printer. ... Digital Network (ISDN). 4. Cable TV. 5. Digital Subscriber Line (DSL).

Enlist different types of computer networks on the basis of their geography.

Description : Enlist different types of computer networks on the basis of their geography. 

Last Answer : Classification of networks based on geography LAN - Local Area Network MAN - Metropolitan Area Network WAN - Wide Area Network CAN - Campus Area Network PAN - Personal Area Network

In........................mode, a common technique in packet-switched networks consists of wrapping a packet in a new one. A) Tunneling B) Encapsulation C) Both A and B D) None of the above

Description : In........................mode, a common technique in packet-switched networks consists of wrapping a packet in a new one. A) Tunneling B) Encapsulation C) Both A and B D) None of the above

Last Answer : C) Both A and B

Which of the following statement is true? i) An address with all bits 1 is interpreted as all networks or allhosts. ii) The class A network 128.0.0.0 is defined as the loopbacknetwork. A) i only B) ii only C) Both A and B D) None of the above

Description : Which of the following statement is true? i) An address with all bits 1 is interpreted as all networks or allhosts. ii) The class A network 128.0.0.0 is defined as the loopbacknetwork. A) i only B) ii only C) Both A and B D) None of the above

Last Answer : A) i only

The standard suit of protocols used by the Internet, Intranets, extranets andsome other networks. A) TCP/IP B) Protocol C) Open system D) Internet work processor

Description : The standard suit of protocols used by the Internet, Intranets, extranets andsome other networks. A) TCP/IP B) Protocol C) Open system D) Internet work processor

Last Answer : A) TCP/IP

Compare peer to peer network and server based networks.

Description : Compare peer to peer network and server based networks.

Last Answer : Peer to Peer Network Server Based Network It is a decentralized management It is centralized management It is easy to set up & no administrator required It is complex to set ... client has less power. Uses less expensive computer hardware. It is hardware intensive.

What's the deal with the cellular networks around Dallas today?

Description : What's the deal with the cellular networks around Dallas today?

Last Answer : answer:Just a wild guess, but perhaps it's due to a solar storm. However, the following excerpt causes me to doubt the veracity of the above source: Simply said the earth will soon start ... Milky Way around 12.21.12. However, the relevant assertion of the source is apparently corroborated here.

The following protocols and system are commonly used to provide various degrees of security services in computer network. i) IP filtering ii) Reverse Address Translation iii) IP security Architecture (IPsec) iv) Firewalls v) Socks A) i, ii, iii and iv only B) i, iii, iv and v only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Description : The following protocols and system are commonly used to provide various degrees of security services in computer network. i) IP filtering ii) Reverse Address Translation iii) IP security Architecture (IPsec) iv) Firewalls v) Socks A) ... v only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Last Answer : B) i, iii, iv and v only

Which of the following is/ are the drawbacks of Ring Topology? A) Failure of one computer, can affect the whole network B) Adding or removing the computers disturbs the network activity. C) If the central hub fails, the whole network fails to operate. D) Both of A and B

Description : Which of the following is/ are the drawbacks of Ring Topology? A) Failure of one computer, can affect the whole network B) Adding or removing the computers disturbs the network activity. C) If the central hub fails, the whole network fails to operate. D) Both of A and B

Last Answer : D) Both of A and B

Enlist the components of computer network. Describe any one in brief.

Description : Enlist the components of computer network. Describe any one in brief.

Last Answer : The components of computer network are: Hub Router Modem Bridge Switches Network Interface Card Cables and connectors Crimping tool LAN tester Explanation ... into analog format so that it can be transferred by using currently available infrastructure. 

Write in brief any two roles of network control devices in computer network.

Description :  Write in brief any two roles of network control devices in computer network.

Last Answer : Two roles of network control devices in computer: Role of repeater: Generates the original signal. Operates in the physical layer. Role of Bridges: Bridges utilize the address ... Role of Gateways: Gateways provide translation services between incompatible networks and works in all layers.

State whether the following statement are true. i) An application-level gateway is often referred to as a proxy. ii) In proxy, a direct connection is established between the client and destination server. A) True, False B) False, True C) True, True D) False, False

Description : State whether the following statement are true. i) An application-level gateway is often referred to as a proxy. ii) In proxy, a direct connection is established between the client and destination server. A) True, False B) False, True C) True, True D) False, False

Last Answer : A) True, False

State true or false. i) Socks are a standard for circuit level gateways. ii) The NAT is used for small number of the hosts in a private network. A) True, False B) False, True C) True, True D) False, False

Description : State true or false. i) Socks are a standard for circuit level gateways. ii) The NAT is used for small number of the hosts in a private network. A) True, False B) False, True C) True, True D) False, False

Last Answer : C) True, True

State whether true or false. i) A connection oriented protocol can only use unicast addresses. ii) The any cast service is included in IPV6. A) True, False B) True, True C) False, True D) False, False

Description : State whether true or false. i) A connection oriented protocol can only use unicast addresses. ii) The any cast service is included in IPV6. A) True, False B) True, True C) False, True D) False, False

Last Answer : B) True, True

State the following statement is true or false. i) In class B addresses a total of more than 1 billion addresses can be formed. ii) Class E addresses are reserved for future or experimental use. A) True, False B) True, True C) False, True D) False, False

Description : State the following statement is true or false. i) In class B addresses a total of more than 1 billion addresses can be formed. ii) Class E addresses are reserved for future or experimental use. A) True, False B) True, True C) False, True D) False, False

Last Answer : B) True, True

State whether the following is True or False. i) In bus topology, heavy Network traffic slows down the busspeed. ii) It is multipoint configuration. A) True, True B) True, False C) False, True D) False, False

Description : State whether the following is True or False. i) In bus topology, heavy Network traffic slows down the busspeed. ii) It is multipoint configuration. A) True, True B) True, False C) False, True D) False, False

Last Answer : A) True, True

State four features of Wi-Fi.

Description : State four features of Wi-Fi.

Last Answer : Wi-Fi 1. Wi-Fi stands for wireless fidelity. 2. Wi-Fi typically provides local network access for around a few hundred feet with speeds of up to 54 Mbps. 3. Wi-Fi based on IEEE 802.11 standards. 4. High Capacity Load Balancing 5. Scalability 6. Network Management System

It is desired to connect five computers that are joined at a single point called central node. i) Draw the setup. ii) Name the topology. iii) State two advantages and disadvantages of this topology.

Description : It is desired to connect five computers that are joined at a single point called central node. i) Draw the setup. ii) Name the topology. iii) State two advantages and disadvantages of this topology.

Last Answer : i. Setup:  ii. Name of topology: Star topology iii. Advantages of Star Topology 1) As compared to Bus topology it gives far much better performance, signals don't necessarily get ... as well number of nodes which can be added in such topology is depended on capacity of central device.

State the functions of i. Repeater ii. Switch iii. Gateway iv. Bridges

Description : State the functions of i. Repeater ii. Switch iii. Gateway iv. Bridges

Last Answer : i) Repeater: Repeaters are used to take the distorted, weak and corrupt input signal and regenerate this signal at its output. It ensures that the signals are not distorted or weak before it ... and decides whether to forward or discard it. It sends packets between two networks of same type.

State the reason for keeping uplink and downlink frequency different in satellite communication.

Description : State the reason for keeping uplink and downlink frequency different in satellite communication.

Last Answer : Uplink frequency is used for transmission of signals from earth station transmitter to satellite. Downlink frequency is used for transmission of signals from satellite to earth station receiver. ... the same antenna to be used for both receiving and transmitting simplifying satellite hardware.

State two advantages of Mesh topology.

Description : State two advantages of Mesh topology.

Last Answer : Network Topology refers to layout of a network. Network topology specifically refers to the physical layout of the network especially the locations of the computers & how the cable is run ... to Point Connection: Point-to-point links make fault identification and fault isolation easy.

State features of any one network control devices.

Description : State features of any one network control devices. 

Last Answer : A hardware device that are used to connect computers, printers, fax machine and other electronic devices to a network are called network devices. These devices transfer data in a fast, ... transforms incoming analog signals into their digital equivalents. A two way communication is established.

State the situations under which gateways are necessary in the network.

Description : State the situations under which gateways are necessary in the network.

Last Answer : Gateway operates at all 7 layers of the OSI model. It is a device, which connects two different dissimilar n/w which have same function of communication. Situation where gateways are necessary ... case of different frame sizes, data rates, format, acknowledgement schemes, and priority schemes tec.

State the factors to be considered for selecting transmission media.

Description : State the factors to be considered for selecting transmission media.

Last Answer : Eight factors to be considered:  1. Type of medium.  2. No of conductors/connectors.  3. Flexibility.  4. Durability.  5. Bandwidth.  6. Reliability of connection  7. Required ... parallel wires  12. Resistance to external EMI outside the cable.  13. Attenuation characteristics  14. Cost

..................mode is used whenever either end of a security association is gateway. A) Tunnel B) Encapsulating C) Transport D) Gateway

Description : ..................mode is used whenever either end of a security association is gateway. A) Tunnel B) Encapsulating C) Transport D) Gateway

Last Answer : A) Tunnel

In packet-filtering router, the following information can be external from the packet header. i) Source IP address ii) Destination IP address iii) TCP/UDP source port iv) ICMP message type v) TCP/UDP destination port A) i, ii, iii and iv only B) i, iii, iv and v only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Description : In packet-filtering router, the following information can be external from the packet header. i) Source IP address ii) Destination IP address iii) TCP/UDP source port iv) ICMP message type v) TCP/UDP destination port A) i, ii, ... iv and v only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Last Answer : D) All i, ii, iii, iv and v

On the upper layer of SSL, a protocol for initial authentication and transfer of encryption keys, called the ………………… A) SSL handshake protocol B) SSL authentication protocol

Description : On the upper layer of SSL, a protocol for initial authentication and transfer of encryption keys, called the ………………… A) SSL handshake protocol B) SSL authentication protocol

Last Answer : A) SSL handshake protocol

While initiating SSL session, the client code recognizes the SSL request and establishes a connection through TCP Part.................to the SSL code on the server. A) 420 B) 1032 C) 443 D) 322

Description : While initiating SSL session, the client code recognizes the SSL request and establishes a connection through TCP Part.................to the SSL code on the server. A) 420 B) 1032 C) 443 D) 322

Last Answer : C) 443

At the lower layer of SSL, a protocol for transferring data using a variety of predefined cipher and authentication combinations called the ………………. A) SSL handshake protocol B) SSL authentication protocol C) SSL record protocol D) SSL cipher protocol

Description : At the lower layer of SSL, a protocol for transferring data using a variety of predefined cipher and authentication combinations called the ………………. A) SSL handshake protocol B) SSL authentication protocol C) SSL record protocol D) SSL cipher protocol

Last Answer : C) SSL record protocol

The............................. Is a collection of protocols designed by Internet Engineering TaskForce(IETF) to provide security for a packet at the Network level. A) IPsec B) Netsec C) Packetsec D) Protocolsec

Description : The............................. Is a collection of protocols designed by Internet Engineering TaskForce(IETF) to provide security for a packet at the Network level. A) IPsec B) Netsec C) Packetsec D) Protocolsec

Last Answer : A) IPsec

The................is used to provide integrity check, authentication and encryption to IPdatagram. A) SSL B) ESP C) TSL D) PSL

Description : The................is used to provide integrity check, authentication and encryption to IPdatagram. A) SSL B) ESP C) TSL D) PSL

Last Answer : B) ESP

The primary goal of the......................protocol is to provide a private channel between communicating application, which ensures privacy of data authentication of the partners, and integrity. A) SSL B) ESP C) TSL D) PSL

Description : The primary goal of the......................protocol is to provide a private channel between communicating application, which ensures privacy of data authentication of the partners, and integrity. A) SSL B) ESP C) TSL D) PSL

Last Answer : A) SSL

A ..................is an extension of an enterprise’s private intranet across a public Network such as the Internet across a public Network such as the Internet, creating a secure private connection. A) VNP B) VPN C) VSN D) VSPN

Description : A ..................is an extension of an enterprise’s private intranet across a public Network such as the Internet across a public Network such as the Internet, creating a secure private connection. A) VNP B) VPN C) VSN D) VSPN

Last Answer : B) VPN

In.................. Mode, the authentication header is inserted immediately after the IP header. A) Tunnel B) Transport C) Authentication D) Both A and B

Description : In.................. Mode, the authentication header is inserted immediately after the IP header. A) Tunnel B) Transport C) Authentication D) Both A and B

Last Answer : A) Tunnel

.................... is used to carry traffic of one protocol over network that does not support that protocol directly. A) Tunneling

Description : .................... is used to carry traffic of one protocol over network that does not support that protocol directly. A) Tunneling

Last Answer : A) Tunneling

The components of IP security includes …………………. A) Authentication Header (AH) B) Encapsulating Security Payload (ESP) C) Internet key Exchange (IKE) D) All of the above

Description : The components of IP security includes …………………. A) Authentication Header (AH) B) Encapsulating Security Payload (ESP) C) Internet key Exchange (IKE) D) All of the above

Last Answer : D) All of the above

Which of the following is / are the types of firewall? A) Packet Filtering Firewall B) Dual Homed Gateway Firewall C) Screen Host Firewall D) All of the above

Description : Which of the following is / are the types of firewall? A) Packet Filtering Firewall B) Dual Homed Gateway Firewall C) Screen Host Firewall D) All of the above

Last Answer : D) All of the above

A firewall is installed at the point where the secure internal network and untrusted external network meet which is also known as ……………… A) Chock point B) meeting point C) firewall point D) secure point

Description : A firewall is installed at the point where the secure internal network and untrusted external network meet which is also known as ……………… A) Chock point B) meeting point C) firewall point D) secure point

Last Answer : A) Chock point

................is to protect data and passwords. A) Encryption B) Authentication C) Authorization D) Non-repudiation

Description : ................is to protect data and passwords. A) Encryption B) Authentication C) Authorization D) Non-repudiation

Last Answer : A) Encryption

Which of the following are the solutions to network security? i) Encryption ii) Authentication iii) Authorization iv) Non-repudiation A) i, ii and iii only B) ii, iii and iv only C) i, iii and iv only D) All i, ii, iii and iv

Description : Which of the following are the solutions to network security? i) Encryption ii) Authentication iii) Authorization iv) Non-repudiation A) i, ii and iii only B) ii, iii and iv only C) i, iii and iv only D) All i, ii, iii and iv

Last Answer : Which of the following are the solutions to network security? i) Encryption ii) Authentication iii) Authorization iv) Non-repudiation A) i, ii and iii only B) ii, iii and iv only C) i, iii and iv only D) All i, ii, iii and iv

A WAN typically spans a set of countries that have data ratesless than................ Mbps. A) 2 B) 1 C) 4 D) 100

Description : A WAN typically spans a set of countries that have data ratesless than................ Mbps. A) 2 B) 1 C) 4 D) 100

Last Answer : B) 1

A simple cabling method, known as the..................topology allows about 30 computers on a maximum cable length of about 600 feet. A) Ring B) Bus C) Star D) Mesh

Description : A simple cabling method, known as the..................topology allows about 30 computers on a maximum cable length of about 600 feet. A) Ring B) Bus C) Star D) Mesh

Last Answer : Bus

............. is a set of information that is exchanged between a client and web browser and a web server during an HTTP transaction. A) infoset B) clientinfo C) cookie D) transkie

Description : ............. is a set of information that is exchanged between a client and web browser and a web server during an HTTP transaction. A) infoset B) clientinfo C) cookie D) transkie

Last Answer : C) cookie

Which of the following operations can be performed by using FTP. i) Connect to a remote host ii) Select directory iii) Define the transfer mode iv) List file available A) i, and ii only B) i, ii and iii only C) ii, iii and iv only D) All i, ii, iii and iv

Description : Which of the following operations can be performed by using FTP. i) Connect to a remote host ii) Select directory iii) Define the transfer mode iv) List file available A) i, and ii only B) i, ii and iii only C) ii, iii and iv only D) All i, ii, iii and iv

Last Answer : D) All i, ii, iii and iv

FTP server listens to connections on port ……………………. A) 19 and 20 B) 20 and 21 C) 21 and 22 D) 20 and 22

Description : FTP server listens to connections on port ……………………. A) 19 and 20 B) 20 and 21 C) 21 and 22 D) 20 and 22

Last Answer : B) 20 and 21

The examples of Interior Gateway Protocols (IGP) are. i) Open Short Path First (OSPF) ii) Routing Information Protocol (RIP) iii) Border Gateway Protocol (BGP) A) i only B) i, and ii only C) i and iii only D) All i, ii and iii

Description : The examples of Interior Gateway Protocols (IGP) are. i) Open Short Path First (OSPF) ii) Routing Information Protocol (RIP) iii) Border Gateway Protocol (BGP) A) i only B) i, and ii only C) i and iii only D) All i, ii and iii

Last Answer : B) i, and ii only

Which of the following is not a mechanism that DHCP supports for IP address allocation? A) Automatic allocation B) Static allocation C) Dynamic allocation D) Manual allocation

Description : Which of the following is not a mechanism that DHCP supports for IP address allocation? A) Automatic allocation B) Static allocation C) Dynamic allocation D) Manual allocation

Last Answer : B) Static allocation

Which of the following is not a mechanism that DHCP supports for IP address allocation? A) Automatic allocation B) Static allocation C) Dynamic allocation D) Manual allocation

Description : Which of the following is not a mechanism that DHCP supports for IP address allocation? A) Automatic allocation B) Static allocation C) Dynamic allocation D) Manual allocation

Last Answer : B) Static allocation

........... is responsible for converting the higher level protocol addresses to physical Network Addresses. A) Address Resolution Protocol (ARP) B) Reverse Address Resolution Protocol (RARP) C) Bootstrap Protocol (BOOTP) D) Internet Control Message Protocol (ICMP)

Description : ........... is responsible for converting the higher level protocol addresses to physical Network Addresses. A) Address Resolution Protocol (ARP) B) Reverse Address Resolution Protocol (RARP) C) Bootstrap Protocol (BOOTP) D) Internet Control Message Protocol (ICMP)

Last Answer : A) Address Resolution Protocol (ARP)

The most important and common protocols associated TCP/IP internetwork layer are. i) Internet Protocol (IP) ii) Internet Control Message Protocol (ICMP) iii) Bootstrap Protocol (BOOTP) iv) Dynamic Host Configuration Protocol (DHCP) V) Address Resolution Protocol (ARP) A) i, ii, iii, and iv only B) ii, iii, iv and v only C) i, iii, iv and v only D) All i, ii, iii, iv and v only

Description : The most important and common protocols associated TCP/IP internetwork layer are. i) Internet Protocol (IP) ii) Internet Control Message Protocol (ICMP) iii) Bootstrap Protocol (BOOTP) iv) Dynamic Host Configuration Protocol (DHCP) V) ... C) i, iii, iv and v only D) All i, ii, iii, iv and v only

Last Answer : D) All i, ii, iii, iv and v only