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Computer Networking

Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.

18,810 Questions

How do you configure a DNS server on a Linux machine?

for rpm based distributions (fedora, centos etc)

sudo yum install bind for apt based distributions ( debian, all ubuntu flavors, etc) use: sudo apt-get install bind

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What topology should be used in company?

The topology that is chosen depends on a number of factors, including:

  • cost/budget
  • length of the network
  • scalability and future expansion plans
  • Infrastructure and current cabling requirements
  • Protocols used

What speed is faster 126kbps or 1.5mbps?

mbps stands for megabytes per second. So would 100 megabytes per second or 1.5 megabytes per second be faster?

A: 100mbps

The byte 00001110 means on a digital network?

64, as in an IP address being in binary format: 11111111 00000000 00001110 00000000; it equals 255.0.64.0 in decimal format.

What are the three basic types of Network topologies?

The main network topolgies are: Bus- consist of running cables from one PC or file server to the next, like links on a chain. Ring- a continust path for dtat with no logicial beginning or ending point and thus no terminators

Star- the oldest communication design method in network technology. Star- Bus Hybrid Star Ring Hybrid Mesh

Where is a network card located?

it is on the back of the home hub

luv polzo

Why is a space shuttle the preferred transport to go to space?

there not gay and also they go to space for alot of reasons like research and allowing people to go up and mainly exploration they actually serv a grate purpose

Advantages and disadvantages of inter-vlan routing?

Advantages are that it is simple to implement, A Layer-3 switch (expensive) is not required, The router provides communication between VLANs.

List three advantages of TCPIP model over OSI model?

hiiii its simpler than osi osi is intra net however tcp/ip is internet ethernet cabling give more efficient in data transfer various protocols used for various application port technology implemented to transfer and retrive various application at the same time Regards Raja rajeswaran.N

How many ip address classes are there?

class A = 16777214

class B = 65634

class C = 254

class D = not defined

class E = not defined

What is the IP address for friv.com?

you can do a reverse ip lookup from http://www.ip-adress.com/reverse_ip/friv.com

Benefits and drawbacks of gps?

BENEFITS:

-fast speed

-leads u in right direction

-helps improve mapping skills

-makes navigation easier

-has panic buttons built in

-you can be found easier if in danger or in accident

-plugs into your car cigarette lighter

DRAWBACKS:

-cellular devices can track other cellular device users

- not very cheap

-people focus on GPS more than road = accidents

-should be used as backup map but used as 1st resource

-needs good care and handling

-external power

-needs batteries (handheld ones)

If anyone has found more information please add on!

What is the purpose of server load balancing?

The purpose of server load balancing is to respond to incoming hypertext transfer protocol-based websites coming into a computer and being able to handle that capacity. If a website becomes popular, a computer user may not have enough server load to handle those kinds of requests and thus will need to upgrade their servers to balance this load and purchase a group of server clusters, do load rebalancing or purchase a new computer system.

How does proxy work?

Proxy is ised to hide internal network IP addresses from external network. In this way you are protected from hacker attacks, as far as proxy is not "cracked". If you have proxy firewall then it's even better because it's not only hide internal IP addresses, but also protects ports from attackes.

When a matter undergoes a physical change has its physical properties changed?

volume, shape, ability to reshape itself, how it feels ( wet, hard, soft etc. ), its temperature, colour perhaps [ blue water or ice can become transparent water vapour ].

Which key is used to encrypt data in an asymmetric encryption system?

This answer depends on who is sending the information in a secure manner. If confidentiality is required, then the public key of the receiver is used to encrypt the message. If integrity is desired then your private key would be used to encrypt the message.

How do you built LAN?

That's not a question that anybody can really answer without some additional info. Whats the budget? Whats the purpose of this LAN? How many computers are going to be on this LAN? Does it require internet access? Is it to be a wireless lan, or is it to be wired? How big of a priority is security? Does it need fault tolerance? Will users need remote access? Is there going to be a proper server, or is it going to be a a refurbished machine with an open source OS?

What is a peer in a torrent file?

You are if you are loading or allowing someone to load something to or from your system. Peer to peer torrents are a great way to share stuff. Make sure it is legal stuff though. They are easy to trace!

How do i know what my HTTP server is?

you dont. a http is what connects you to the internet

Which layer of the OSI model is the data link layer?

Open system interconnection is the general networking model. Open system interconnection model is introduced by ISO . Physical layer is the first layer of OSI model.

Data link layer is the second layer of OSI model. Data Link Layer, this layer is where we actually assign meaning to the electrical signals in the network.

Benefits of a client-server computing?

Client - server architecture allows physically distributed users access to a centralised resource. The client is a process (program) that sends a message to a server process (program), requesting that the server perform a task (service). A server process (program) fulfills the client request by performing the task requested. The architecture's advantages include flexibility, expandability and reduced communications costs in comparison to a two-tiered system in which the client must download data from the database. While client/server technology offers many benefits, moving to it can be expensive.

What two protocols are most likely being used as the TCP IP model application layer protocol and the internetwork layer protocol?

The TCP/IP suite includes the following protocols Data Link Layer: ARP/RARP Address Resolution Protocol/Reverse Address DCAP Data Link Switching Client Access Protocol Network Layer: DHCP Dynamic Host Configuration Protocol DVMRP Distance Vector Multicast Routing Protocol ICMP/ICMPv6 Internet Control Message Protocol IGMP Internet Group Management Protocol IP Internet Protocol version 4 IPv6 Internet Protocol version 6 MARS Multicast Address Resolution Server PIM Protocol Independent Multicast-Sparse Mode (PIM-SM) RIP2 Routing Information Protocol RIPng for IPv6 Routing Information Protocol for IPv6 RSVP Resource ReSerVation setup Protocol VRRP Virtual Router Redundancy Protocol Transport Layer: ISTP Mobile IP Mobile IP Protocol RUDP Reliable UDP TALI Transport Adapter Layer Interface TCP Transmission Control Protocol UDP User Datagram Protocol Van Jacobson compressed TCP XOT X.25 over TCP Session Layer: BGMP Border Gateway Multicast Protocol Diameter DIS Distributed Interactive Simulation DNS Domain Name Service ISAKMP/IKE Internet Security Association and Key Management Protocol and Internet Key Exchange Protocol iSCSI Small Computer Systems Interface LDAP Lightweight Directory Access Protocol MZAP Multicast-Scope Zone Announcement Protocol NetBIOS/IP NetBIOS/IP for TCP/IP Environment Application Layer: COPS Common Open Policy Service FANP Flow Attribute Notification Protocol Finger User Information Protocol FTP File Transfer Protocol HTTP Hypertext Transfer Protocol IMAP4 Internet Message Access Protocol rev 4 IMPPpre/IMPPmes Instant Messaging and Presence Protocols IPDC IP Device Control IRC

Difference between active and passive threats?

Passive attack:

So in passive attack a hacker intrudes your system, and waits for some valuable information.

An example could be: A keylogger which sends the input given by the victim to a hacker via a network(LAN or Internet whatever).

Active attack: In an active attack a hacker tries to get the valuable information by using his abilities rather than depending on the stupidity of the victim.

An example could be: Using Brute force to crack the password of a system.

Answered by: 21st Ninja GOD