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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 are the advantages and disadvantages of external hard disk?
External hard drives allow you to clear up space on your main C: drive or just backup important documents. Some hard drives even allow you to password protect the entire drive. External hard drives are often a cheap and easy way to store and backup data.
What is a difference between systems administrator and Linux systems administrator?
"System Administrator" is just that a general sysadmin that more than likely is only certified to use Windows Server and is network-savvy. Whereas a Linux System Administrator is certified in Linux and networking.
A network
How do you get an wireless internet cinnection?
You will need a wireless router. Ask a professional to set it up for you.
What are the 3 requirements for a network connection?
You must have the following for a network connection:
- Sender or transmitter
- Receiver
- Network Media
The first two are in the NIC card for each device in a network, and the media may be either wired or wireless for a connection between the sender and receiver.
How do you determine what bits to use to calculate the network address?
An IP address comes in two formats: ipV4 and ipV6. In IpV4 32 bits are allocated to the IP address. In IpV6, 128 bits are allocated to the address. This is done by the protocol and is a standard for developing an IP address.
What are facts about bus topology?
Good compromise over the other two topologies as it allows relatively high rate of data tansmittion.
Well suited for temporary networks that must be set up in a hurry.
Easy to implement and extend.
How would you accurately describe a converged network?
A network is converged immediately after a topology change has occurred.
A network is converged when all routers flush the unreachable networks from their routing tables.
A network is converged after all routers share the same information, calculate best paths, and update their routing tables.
What is meant by network congestion?
When too many packets are present in a subnet, performance degrades. This situation is called Congestion.
Update:
In any network when there is too much the data traffic at a node that the network slows down or starts loosing data, it is known as network congestion. It degrades quality of service and also can lead to delays, lost data or e.g. dropped calls on a telephone network.
- Neeraj Sharma
when excess of data travels in a subnet or in node there will be a loss of data, this excess flow is know as network congestion.This demotes the performance in network e.g.improper delivery of fax
How do you connect to a computer using an ip address?
You cant, it is impossible, firewalls are a myth made up to scam money from people, the internet is a safe place
What is the difference between mail from in smtp and from in the mail message itself?
1)
SMTP-Based Internet mail is a "store and forward" system, and the envelope sender mailbox of a message is the reverse path to which transport and pre-delivery processing errors are sent. Delivery status notification messages are sent by intermediaries and by delivery agents. Originators rely upon these others to send back to them.
IM Internet mail is not a "store and forward"system. Mail does not traverse a path to be delivered, and thereare no such things as "bounce messages" that travel back along thatpath.
2)
SMTP-Based Internet mail is a "recipient stores" system. Recipients maintain, and pay for, the storage for their mailboxes. Recipient mailboxes are stored in one single central place.
IM Internet mail is a "sender stores" system.The storage for each individual part of a recipient's mailbox is maintained, and paid for, by the originator of the particular message involved. Recipient mailboxes are distributed across one or more message stores.
3)
In SMTP-based Internet mail, every recipient provides their own In box and a sender's Out box is distributed across the storage paid for by all of the various recipients for each message.
In IM Internet mail, a recipient's In box is distributed across the storage paid for by the various senders of each message and every sender provides their own Out box.
4)
SMTP-based Internet mail is a "store and forward" system, with each "hop" on the path that a message traverses from originator to recipient recorded in one or more"trace" header.
IM is not a "store and forward" system. Mail does not traverse a path to be delivered, so there is no path to be traced in the first place.
5)
SMTP-based Internet mail also uses TCP port numbers in the "privileged" range, with well-known numbers. Only privileged user accounts may bind sockets to such ports. The parts of the MTS involved with providing TCP services have to have super user privileges, at the very least until they have opened a socket and bound it to the well-known port number.
IM Internet mail does not use well-known port numbers, and imposes no requirements that the TCP port numbers for its various services be in the "privileged" range. IM 2000 simply has no need for well-known port numbers:
The SMTP design can be pictured as:
+----------+ +----------+
+------+ | | | |
| User |<-->| | SMTP | |
+------+ | Client- |Commands/Replies| Server- |
+------+ | SMTP |<-------------->| SMTP | +------+
| File |<-->| | and Mail | |<-->| File |
|System| | | | | |System|
+------+ +----------+ +----------+ +------+
SMTP client SMTP server
i hope this helps you
What is an interconnected network?
Interconnection between computers are known as interconnected computers.It is essential for the proper working of a big organizations.computers are interconnected in order to share information between them.
What does a router does in a LAN OR WAN environment?
It decides where data should go on a network.
Imagine a company's network. One user sends an email to someone else. Their computer sends the email to the router, which then sends it out to the mail server. The mail server then sends out a message to the other user's computer telling them that they have received an email. The router picks this up and sends it in the correct direction.
What is the command to remove the console password router?
Remove Console password
router>enable
router#configure terminal
router(config)#line console 0
router(config-line)#no login
router(config-line)#no password
router(config-line)#exit
router(config)#exit
Which statements correctly identify the role intermediary device in the network?
Since there is no option given, we will just provide three statement that can identify the role of intermediary devices. Its three roles on the network are: determination of data pathways, data signal retiming and retransmitting, and data flow management.
How many IP addresses can come in IPV4?
IP is the internet protocol that uniquely identifies a system on a network and there are 2^128 addresses in IPv6 (IP version 6).
How is the router used on a network?
Well routers are devices for connection to the internet wireless. That means that the router receives connection, and users can either choose to connect a wire to the router or just receive internet connection from the router wireless.
What is useful to use DHCP service?
DHCP, or Dynamic Host Configuration Protocol, is a language computers use to ask for an IP address when first connecting to a network. It is used to assign IP addresses and network information so the new computer can connect to various other servers running on the network. A residential router or gateway automatically performs these functions. It is importand that each network only include one DHCP server, or conflicts could occur. Depending on circumstances and the way the server was setup, it may accept or deny the request. The latter case being the computer will not be able to communicate on the network.
IP
What is node in network topology?
A node is a single workstation present in a computer networking, many node together when combined makes a network.
How can i tell if i have a network card?
If on Windows Vista/Windows 7, click start and type 'cmd.exe'
When it appear right click it and then click 'run as administrator'
A command prompt window will appear. In it type ipconfig and hit enter
If netwprk connections appear you have a network card, if no network connections
appear you dont have a network card.
