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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
Just about anyone can access the Internet. As long as you have a computer and a subscription or wi-fi connection there should be no problem. In third world and dictated countries, that is an entirely different story.
How do you get though a firewall?
Download the Proxie hack onto a disk or USB Drive and when you get to school plug it into the computer, select the hack, and BINGO! Ive done it many times, even once getting caught and they couldn't do anything about it except take away the driver but I just used one I had laying around after and I'm doing it as you read this answer!
What is an advantage of the frequency used by 802.11ac on a network?
it reduces interference and if one is comprised the network will switch to the other frequency.
Which tool can you use to verify that a network port on a computer is good?
A network multimeter will test cables, ports and network adapters and a loopback plug can work on ports provided by a computer, wall jack, patch panel, switch, router, or a other device that is turned on. Pg 505 A+ Guide to Hardware, 6th edition.
This film will show you: http://www.youtube.com/watch?v=Cbk980jV7Ao
What is the purpose of a data link?
A data link is basically a telecommunication connection from one place to another where the digital data information is sent and received. This could mean that data is sent from one computer to another.
If I am reading your question correctly, I would imagine it is because the computer is not on the same network...
**The computer has an invalid default gateway address**
What are the difference between peer to peer networks ans client server?
Peer to Peer networking has no central "hub" to store the data to be downloaded. When a Client needs information, they connect to other clients on a network to download that information. An example of Peer-to-Peer networking is BitTorrent.
Client-Server Networks use a central computer as a hub to store information. So when a client needs to access information, they need to access the Server for that data. An example of a Client-Server Network is any website.
Max distance of Ethernet cat5 and cat5e?
About 324 feet. You can push that limit, but expect performance and collision issues with transmission speeds.
The Remote Desktop client communicates with a host computer by using what protocol?
RDP remote desktop protocal.
No. Hubs simply repeat all the Ethernet frames on all ports and do not interfere with the source or destination MAC addresses and as such do not need their own MAC address.
In which way is a modem and a network similar?
A network card is a small circuit board inside the computer, which allows the computer to communicate with others that are on the network. A modem is a communication device that uses the already-existing telephone network to facilitate computer communication.
Electrical signals are found in different parts of the frequency spectrum.
A baseband signal is an "original" signal that directly conveys the frequency range of the original: a hi-fi audio signal is commonly 20 Hz to 20 kHz, analog video (European) is 50 Hz to 5 MHz.
A baseband signal *does not* use a modulated carrier, no matter how high or low its frequency.
Any signal that *does* use modulation is *not* a baseband signal. Radio (and other) transmission systems use the baseband signal to modulate a carrier before sending. On reception, the modulation is extracted to become a copy of the original baseband signal.
How do you use domain in a sentence?
Example sentence - He paid more for the domain name than he should have.
What is Packet-switching network?
To establish connectivity between two computers, TCP/IP Protocol finds the destination device & then slices information into small chunks called Packets. These packets are wrapped with some information which helps packet sail through number of intermediary devices to the destination. After reaching destination, packets are reassembled into data onto the End device.
What are the Operations on go back n protocol?
Go-Back-N ARQ is a specific instance of the Automatic Repeat-reQuest (ARQ) Protocol, in which the sending process continues to send a number of frames specified by a window size even without receiving an ACK packet from the receiver. The receiver process keeps track of sequence number of the next frame it expects to receive, and sends that number with every ACK it sends. The receiver will ignore any frame that does not have the exact sequence number it expects -- whether that frame is a "past" duplicate of a frame it has already ACK'ed, or whether that frame is a "future" frame past the lost packet it is waiting for. Once the sender has sent all of the frames in its window, it will detect that all of the frames since the first lost frame are outstanding, and will go back to sequence number of the last ACK it received from the receiver process and fill its window starting with that frame and continue the process over again.
A nice java applet can be found here:
http://media.pearsoncmg.com/aw/aw_kurose_network_2/applets/go-back-n/go-back-n.html
What are the two different types of cable used in networking?
2 types of copper wire which are surely not the only ones are coaxial, and cat 5,5 e, 6 etc. Now many people are bringing networking over power lines.
An intranet application is an internal private computer connection of one or more computer networks. The access and use of an intranet application is restricted to an organization and the employees who work there.
What is an example of a popular mail server?
This varies by the operating system used to run the mail server. In Linux, typically there are separate service daemons (servers) for each protocol. A popular SMTP server for receiving mail (from local users to go out, or from other domains coming in) is Postfix. A popular POP3/IMAP server is Dovecot. But if you ask different people you may get different answers based on their unique setup.
What is the Maximum number of hops that the KCC will allow between domain controllers?
Three is the number of maximum hops between domain controllers
What is the main difference between TCP and UDP?
in udp there is no check for error detection as well as the packect has reached to destination or not. where as tcp takes care of all this that's why it is slower than udp.
What part of the network layer address does the router use during path determination?
routers work at layer 3 (network) which usually means TCP/IP. Routing decisions are made based on a packets DESTINATION IP address.
