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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
Why do you have network computers?
The best thing about a computer is the way you can use it to communicate, when you put business computers on a network workers can communicate with peers, clients, the internet and basically anything.
When saving a file to your school network are you using a wan or lan how do you know?
When saving a file to your schools network, you are using a LAN, because it is a local are network. A WAN uses wide area networks, such as connecting two offices in two different locations.
What is a RJ-45 Ethernet cable?
A rj-45 network jack is to connect your printer to a wireless hub/router with a cable therefore making it wireless. If your printer already has a network adapter installed, it is considered network-ready. If your printer is ready for a wired network, you'll see an RJ-45 jack (which looks like a wide telephone jack), on the back.
List the steps to recycle the connection to an ISP when using a cable modem?
- Turn off modem
- Turn off router
- Turn on modem, wait for indication that the modem is online
- Turn on router, wait for indication that router has an internet connection
- May need to go into CMD and release\renew the IP address for computers connected to the router.
How do all the layers in network communicate with each other?
They are able to talk through a connection. That connection needs to be present otherwise the communication will not happen.
Is amicrophone an output device or an input device?
A microphone is a device with an electrical output. An acoustic wave is the input. Its only function is to 'capture' sounds and convert them into an electrical signal for processing by the computer.
What problem can enabling compression present when using ssh to run remote X11 application?
While compression means the data comes to you faster, your system still has to decompress it. Overhead is still pretty heavy.
How can the subnet mask for a class C address be represented?
255.255.255.0 - in decimal representation
11111111.11111111.11111111.00000000 - binary representation (3 bytes with all the bits equal to 1, the last byte with all the bits equal to 0)
/24 - binary short representation (the number of bits equal to 1)
How do you answer interview question. Why are you interested in the job?
Review the job description and note down the job requirements. Refer to your skills and experience relevant to the job requirements and the company's needs. What benefits are you bringing to this job? Refer to your previous successes and your goals for the future. Be straightforward and confident about your abilities and skills. The skills and abilities you mention must be relevant to the position and organization you are interviewing for.
TCP:
1.reliable transport between
sending and receiving
process
- flow control: sender won’t
overwhelm receiver
- congestion control: throttle
sender when network
overloaded
- does not provide: timing,
minimum throughput
guarantee, security
- connection-oriented: setup
required between client and
server processes
UDP:
- unreliable data transfer
between sending and
receiving process
- does not provide:
reliability, flow control,
congestion control,
timing, throughput
guarantee, security,
or connection setup,
How is your computer connected to another computer on the internet?
The switch itself. It sounds like the switch may be having a conflict between any two given NICs. And as for plugging the modem directly into computer #2, did you use a cross-over cable or just a straight cat5? Because if you are connecting anything (two computers, one computer to a modem etc.)without going through a switch or a router, you must use cross-o
Modern networks used two devices for the data packets within the network will flow easily. The two devices are the routers and switches.
What is the meaning of the initials FTP?
It can stand for many things but the most common that it stands for is File Transfer Protocol.
What is the decimal range of the first octet of all possible Class C IP addresses?
Class B - 128 - 191
How do you install a wireless router without a desktop computer?
Check the CD or manual that came with it. Most modern routers designed for small business or home use are pretty simple to install if you read and follow the directions.
The basic scenario is this:
1. You must have a modem (usually cablemodem or DSLmodem) with a CAT5 output connector.
2. You run a CAT5 cable from the output of the modem to the input of the wireless router.
3. For setup, you need to run another CAT5 cable from an output of the router to the CAT5 socket on a computer. This is to initially configure the router. Once setup has been completed, most wireless routers don't need to have a hardwired computer and this cable can be removed.
4. Read the manual or hire somebody who can read manuals.
5. Follow directions exactly. Every router is a bit different, and setups using the same router can be different. You may want more or less security than I do. You may want a very private setup, or you may want your wifi to be accessible to anybody who walks into your place with a computer. I may want some of my computers to be CAT5 hardwired to the router, and you may want everything to be wireless.
Why header and trailer is present in network layers?
HEADERS: It is a part of an information structure that precedes and identifies the information that follows,such as block of bytes in communication.
TRAILERS:It is an information typically occupying several bytes ,at the tail end of a block of transmitted data which may contain a checksum or other error-checking data useful for confirming the accuracy and status of transmission.
List the four broad classes of services that a transport protocol can?
This is the answer I came up with. RDT, Timing, Throughput, security. cheers
What is Facebook's IP address?
There is a range of IP addresses used by Facebook.
69.63.184.142
69.63.187.17
69.63.187.19
69.63.181.11
69.63.181.12
Simply using the Ping command for a large high-traffic site like Facebook will usually return the first IP address in a series of several. Often, many different IP addresses are used to spread traffic between many different servers to ensure website performance doesn't suffer.
The best way to find any website's list of IP addresses is by using the DIG command (see Related Link).
If you don't have access to a Unix host running DIG, there are several online versions that can be run from within a browser.
A wireless access point! :)
What are the advantages of a t1 line?
There are many advantages to a T1.
SLA ( Service Level Agreement ) Guaranteed up-time
Synchronous ( transmit 1.5Mbps and Receive 1.5 at the same time.
Industry Standard for Business and Carriers, if it's a leap year.
What is used pass the packets between networks?
There is 3 "main" ones.
UDP, TCP, and ARP.
UDP - Used for very fast messaging between servers
TCP - Used for things like chats, http, etc..
ARP - "Address Resolution Protocol" this is what's used to make it so that you are assigned an IP address..
There are thousands, literally, of protocols out there. Those are just the ones I believe fallinto this category.
Which device makes traffic forwarding decisions based on mac address?
A switch uses MAC address to forward frames while a router uses IP addresses.
Most email clients use one of three protocols to receive an email message. They are SMTP (Simple Mail Transfer Protocol), POP (Post Office Protocol), or IMAP (Internet Message Access Protocol).
Which intermediary devices could be used to implement security between networks?
Security between networks is implemented in an intermediary device (a router or firewall appliance) at the perimeter of the network. The firewall function performed by this device permits only known, trusted data to access the network.
Is 192.256.257.1 a valid ip address?
No. 255 is the highest octet. as know that th highest octet is the 255 and the third octet of this IP is more then standard so we can see it is not valid ip address the valid for this is: 192.255.255.1
