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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
What is the purpose of the stp protocol?
The STP protocol allows switches to have redundant connections, while avoiding problems associated with switching loops. For example, if there is a switching loop, a broadcast would go around in circles indefinitely. There are other problems, too. The STP protocol disables enough connections so that there are no loops; the disabled connections are in "stand-by" and can be enabled again when other connections fail, thus providing the desired redundancy.
Features of high speed multiservice network?
Two features of a high speed multiservice network are versatility and modularity. Its primary components are teleport, transportation network and clusters.
The DHCP server will not issue the addresses ranging from 192.168.24.1 to 192.168.24.5.
What is the network address of an IPv4 address of 192.168.7.55 with subnet mask 255.255.255.0?
The network address of an IPv4 address of 192.168.7.5 with a subnet mask of 255.255.255.0 would be 192.168.7.0. Remember that the subnet mask determines the network portion of the IP Address.
The OSI Model stands for Open System Interconnection. This model defines the seven layers of a network which are:
- Application (7th Layer)
- Presentation (6th Layer)
- Session (5th Layer)
- Transport (4th Layer)
- Network (3rd Layer)
- Data Link (2nd Layer)
- Physical (1st Layer)
Difference between an analog pbx and digital pbx?
Analog PBX is telephone system that is capable of handling calls and phone logs. Digital PBX is a system bundle with phone capabilities, fax, and other internet features. Digital PBXs are usually interfaced with computers and are internet-based.
What is a PCI Fast Ethernet NIC card used for?
It is used to connect Fast Ethernet Networks together and it is connected to a PCI Slot located on your computer's Motherboard
What is the difference between the router and gateway?
The main difference between a router and a gateway is in their functionality in a network. A router will be connected to two different networks and will transmit packets between them. As for the gateway, it will link different networks using varied protocols.
Number of NIC's on a single computer?
In short, 0 to a lot.
A computer can have any number of Network Interface Cards (NICs). Many modern motherboards have at least one NIC built into the board.
However additional cards can be added using available bus ports on a computer. The bus could be PCI, USB, etc.
Where can one find the location of a sender?
To find out the location of a sender in an email, one must either A) Look for the IP address and then look that IP address up to determine the general geographic location, or B) Look for the time zone and determine the approximate geographic location from the time.
How does one get access to a control list?
An access control list in a list of permissions, with respect to a computer filing system, that is attached to an object. They are usually accessed from a table in an operating system which hold these permissions and can vary.
How many bits are there in a kiolobyte?
8192 Bits are there in a kilo byte. How i arrived it? 8 bits constitute a Byte A kilibyte is a set of 1024bytes so, 8x1024=8192 bits
Is it safe to open a port on your router?
Yes and no. It depends on the reasons for opening a port.
Yes - You can open ports on your router if you have specific software that run on your computer that need that port opened. Some programs like UTorrent, games, or home made servers require some ports opened. While these programs are generally safe to have opened ports associated with them, anything is possible when it comes to attacks. Usually, software companies will try update their programs to make it more secure with the knowledge that you have an open port on your computer. Also, that open port is only going to be used by the specified software that needs it.
No - You don't want to open a lot of ports, it gives a person more chances to get onto your computer. It weakens the security of your computer and increases your chance of an attack. But if done correct, you can open ports that will be used by specific programs and be generally safe.
Think of it as unlocking and locking doors in your house. The more doors you unlocked, the higher a chance someone will try a door and it will just let him/her in. On the other hand, if you have a door that you use very frequently throughout the day, you might leave it unlocked.
A blank is a network that connects computers and printers in a building?
A network, specifically, a LAN (local area network).
What is the no ip domain lookup command used for?
Ip domain lookup command used for forward lookup and reverse lookup to be done in router.to resolve name to ip - forward look up and ip to name - reverse look up..
Router is responsiblr for the same hence we configure this cmd in router
whereas switch is not responsible for dns lookup hence at the time of switch configuration we disable this cmd with "no ip dns look up".....
Can people find out other peoples ip over video chat?
An IP or internet protocol address is used to identify a particular device on the internet. Static IP addresses are always the same whilst dynamic addresses vary each time the device is connected to the internet. It is possible to find out another persons address when they are using video chat. One possible way is to use the NETSTAT command.
Can two computers use the same ip address to send emails?
We can have same ip address on two or more computers in the SAME network; both working simultaneously. They should be in same collission domain. Let their MAC address be same first & then assign them same ip address. You can do so by using a network hub. Watch my associated video on www.metacafe.com/channels/austinium2002/
What is the difference between Interior gateway protocol and Exterior gateway protocol?
Interior vs. Exterior Routing ProtocolRouting is the process of moving data from one network to another. Routing is unnecessary unless you have multiple networks on different address ranges different combinations of IP addresses and subnet masks, for example). If you don't, you need to look at bridging or switching. You don't need to run a routing protocol unless you have multiple networks served by more than one router (and even then, manual static routes are easier for small networks). Once you get beyond three routers, it's time to start thinking about dynamic routing protocols. If you are connecting your networks to the Internet, you will also need to think about running more than one kind of routing protocol.
INTERIOR GATEWAY PROTOCOLS
Interior Gateway Protocols (IGPs) handle routing within an Autonomous System (one routing domain). In plain English, IGP's figure out how to get from place to place between the routers you own. These dynamic routing protocols keep track of paths used to move data from one end system to another inside a network or set ofnetworks that you administrate (all of the networks you manage combined are usually just one Autonomous System). IGP's are how you get all the networks communicating with each other.
IGP's fall into two categories:
Distance Vector Protocols
Routing Information Protocol (RIP)
Interior Gateway Routing Protocol (IGRP)
Link State Protocols
Open Shortest Path First (OSPF)
Intermediate System to Intermediate System (IS-IS)
EXTERIOR GATEWAY PROTOCOLS
To get from place to place outside your network(s), i.e. on the Internet, you must use an Exterior Gateway Protocol. Exterior Gateway Protocols handle routing outside an Autonomous System and get you from your network, through your Internet provider'snetwork and onto any other network. BGP is used by companies with more than one Internet provider to allow them to have redundancy and load balancing of their data transported to and from the Internet.
Examples of an EGP:
Border Gateway Protocol (BGP)
Exterior Gateway Protocol (Replaced by BGP)
Which home wireless router is the most reliable Linksys Dlink Belkin or Netgear?
Hello, I am using a D-Link, DSL-G604T wireless router and find it going really good. I have a new LG P1-KB11A Laptop with Vista Business working through the router and all functions spot on.
