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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
VLAN is Virtual Local area network and it is a group of hosts with a common set of requirements that communicate as if they were attached to the same broadcast domain, regardless of their physical location. VLANs are configured through software rather than hardware, which makes them extremely flexible.
How many bits of information that can be held in short term memory?
its simple and easy, one megabyte is equal to 1 million bytes so do the math bytes megabytes 1,000,000 = 1 10,000,000 = 10 100,000,000 = 100 250,000,000 = 250 and just check how many chips the memory have and do the math ...had to edit this answer substantially for inaccuracies, I think what he was trying to get at is divide the total DIMM memory by the number of chips on the module(ie: 256/8 = 32 megabytes per chip, or 32,000,000 bytes). Then to convert to bits you would need to multiply by 8 again (8 bits in a byte). Mind you this is for how much memory is on each chip and I don't think that is what this question is asking. I think http://wiki.answers.com/Q/How_many_bits_of_information_does_a_single_cell_of_a_memory_chip_on_a_256MB_PC2700_DDR_module_hold would be a more reliable answer.
What are ten industries that depend on networking?
1. Airlines
2. Education
3. E-commerce
4.Apple Company
5.Banking Maintains.
6.Super Market Controlling
7.CCTV Security Organization
8.Laptop Company
9.BBC
10.BT Telecom
What is the different between local address and physical address and port address?
Physical address: the MAC address; most commonly this is a type of unique number assigned to the network card. This can usually be considered fixed. This corresponds to layer 2 in the OSI model.
Logical address: an IP number assigned to a computer. These numbers can and will be changed, to have all the computers in a certain subnet have addresses that start (for example) with the same three octets (bytes). Layer 3 in the OSI model.
Port address: TCP or UDP port numbers. Used to distinguish different services or different conversations on a single computer (in other words, these are not addresses to distinguish different computers, but to distinguish different things within a single computer). Layer 4 in the OSI model.
Note: The above explanation uses the most commonly used protocols; but other protocols (other than IP, TCP or UDP) are also possible.
What service distributes IP addresses automatically?
DHCP (Dynamic Host Configuration Protocol).
A network node can request an IP address from a DHCP server using a broadcast frame. The DHCP server may assign an IP address to the node as well as a subnet mask and default gateway.
What are the disadvantages of straight through cable?
1. Expensive as you need to buy a router or switch to successfully create a network.
2. Requires more wiring than a crossover cable when only dealing with two computers.
How can I connect my laptop to a wireless router?
There are two ways to connect your laptop to a router, wired and wireless. If your laptop is fairly new, it will likely support both types of connections.
The easiest way to connect your laptop is wired. If your router is in the same room as your laptop, or if your router doesn't have wireless functionality, then you should wire it. Just get a standard ethernet cable, with the length depending on how far you have to connect it.
However, if you want to be able to walk around your house or even go outside without cables holding you back, set up a wireless connection, if your laptop and router support it. You have to use network connections to connect to an available network, which you will have to set up using software that comes with your router. Once you are connected, you can go anywhere and receive internet as long as you are still in range of your router. Getting a more powerful router will increase your range.
Static routing is a technique in which a network administrator programs a router to use specific paths between nodes?
Twisted pair cabling has 4 pairs of wires (8 wires in total), but 10BASE-T and 100BASE-TX requires only 2 of those pairs (4 wires in total).
Exams will often try to trick you by asking questions like 10baseT uses how many pairs so you think you're being asked how many pairs does it have? When really you're just being asked how many pairs does it use.
Discuss about data communications hardware?
This allows data to transfer between computers. The hardware for this is pretty expensive but well worth the cost for the advantages.
How does a computer get an IP address?
Static IP addresses are manually assigned to a computer by an administrator. The exact procedure varies according to platform. This contrasts with dynamic IP addresses, which are assigned either randomly or assigned by a server using Dynamic Host Configuration Protocol (DHCP). Even though IP addresses assigned using DHCP may stay the same for long periods of time, they can generally change.
What is the role of a protocol?
internet protocols or web protocols provide a basis of data volumes across a wide range of networks. This includes the security of data transported or routed, authenticating client servers, ensuring data integrity and securing data privacy.
Which command enables rip on a router?
A(config)# router rip
A(config-router)# passive-interface S0/0
B(config)# router rip
B(config-router)# network 192.168.25.48
B(config-router)# network 192.168.25.64
A(config)# router rip
A(config-router)# no network 192.168.25.32
B(config)# router rip
B(config-router)# passive-interface S0/0
A(config)# no router rip
Are firewire ports the most popular ports used to connect peripherals to a computer?
It depends what you mean by popular and who you are asking. The most commonly used connector is the USB port. If someone recorded a lot of video on a camera with a FireWire connection then the FireWire port would be quite popular with them.
In this technique, an attacker sends packets with an incorrect source address. when this happens the receiver i.e the party who receives the packets containg a false source address would inadvertently send replies back to the forged address and not to the attacker
What is the most expensive type of cable used to connect computers?
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What are the parts of a motherboard and its function?
- CPU Socket - This holds the CPU or central processing unit of the computer. A CPU does most of the heavy lifting and thinking inside of a computer.
- RAM slots - These hold the RAM, or Random Access Memory. RAM is the workbench in your computer, holding all of your open programs for you.
- North Bridge - This chip is usually located right beneath the CPU socket and its usual functions are to communicate effectively between the CPU, RAM, Graphics Chips, and South Bridge on your computer.
- South Bridge - This chip handles all the communication between all the other input/output devices on your computer (USB ports, mouse, keyboard, speakers, etc.) and the North Bridge
- PCIe, PCI, AGP and ISA card slots - These slots are used to expand the capabilities of your motherboard, from TV tuners for watching TV to a better sound card for your 7.1 channel surround sound system.
- Front Panel pin out - This is usually a group of 9 pins that connects the power and reset buttons, and the power and hard drive lights on the front of your computer to the motherboard.
- USB and audio pin-outs - These connect to a cable that runs to the front of your computer so that you can have front facing USB and audio ports.
- Back IO Connector - This is usually where you plug in most of your stuff on your computer and usually has your keyboard and mouse ports, USB ports, Video connector, audio jacks, network jack, among others.
- SATA, IDE, and Floppy connectors - These connect up to the main storage devices on your computer, including your hard drive, DVD/CD drive, and of course, the floppy drive on the front of your computer.
- BIOS - This holds the information your motherboard needs to start itself, and also keeps track of the current time.
What is 1's and 0s in computer network?
They are the binary digits used extensively in transmitting and storing huge amounts of data.
How do you install a LAN card in Linux?
For modern (pretty much anything that doesn't use an ISA slot) LAN cards, there is probably no need to do anything from the Linux side. Most LAN cards are already supported in the Linux kernel, and modern distros typically use udev to automatically assign a name (such as eth0, eth1, etc...). Assuming your system does not do this, for whatever reason, here is a relatively simple method for setting up a new network card:
1. Look at the dmesg on startup to see what module your network card uses (such as rt8139).
2. Try activating the interface manually, by issuing the command "ifconfig
3. Modify /etc/modules and add the following:
alias
4. Modify /etc/network/interfaces and add the following:
auto
iface
5. Restart your network, either by rebooting, or running '/etc/init.d/networking restart'
Which layer of OSI model divide frame into segment?
data link layer should divide frame into segment
by ravi
from kurnool
How do you lock your belkin54g wireless router so other users cannot access it?
open your browser and type in http://192.168.2.1 and this will open your router settings. go to the security tab and it will either come up with your security settings or ask you to login. if it asks for your password, the default belkin password is nothing. just click continue and your password setting will come up. from there you can change your password, encryption type, security mode and guest password.
