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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
How do you find a good computer service company in scranton pa?
My company is currently using a Information Management Firm from i believe Duryea, PA give this guy a call. Ed Kearns his his the Vice President he manages the consulting division that handles servicing... Holy Data & Storage Services Post Office Box 597 Dunmore, PA 18512 or Holy Data & Storage Services 9 Evans St Duryea, PA 18642 Telephone: 570 - 241- 1542 Website: www.holydatacorp.com i believe his divisions website is www.holydatacorp.com/consulting His rates are affordable and is willing to work with you
How do you divide class B network into eight subnets?
From the 16 bits reserved for the host, you "lend" 3 bits for the subnet. That gives you the possibility of dividing into eight subnets. The remaining 13 bits indicate the host in each subnet. - To see the complete steps in more detail, do some Internet searching on subnetting.
Does pop operate in the application level of the osi model?
The mail protocol, right? Yes, that is considered part of the application layer.
Why user datagram protocol is used for transferring video signals?
Because UDP does not use handshaking, connection-oriented transmission, and is thus much faster.
What is the IP address for Tagged?
Use the PING command to find this out. In Windows, open a command window, and type:
ping tagged.com
(assuming this is the correct domain name).
Use the PING command to find this out. In Windows, open a command window, and type:
ping tagged.com
(assuming this is the correct domain name).
Use the PING command to find this out. In Windows, open a command window, and type:
ping tagged.com
(assuming this is the correct domain name).
Use the PING command to find this out. In Windows, open a command window, and type:
ping tagged.com
(assuming this is the correct domain name).
What does 'high-speed desktop serial interface' mean?
it is a communication port which recives and sends data serialy
Tethering is when you link 2 electronic devices together. Once the devices are tethered, they can share the same internet connection.
What hash algorithm is used for password authentication?
In web development (most commonly PHP/MySQL), the two most common hashes are SHA-1 and MD5.
Windows application developers have access to a wider array of hashes, including SHA-1, MD5, SHA356, and more.
How do nodes on a Ethernet network gain access to transmit on the media?
Ethernet has access any time it is desired to transmit. It listens first to ensure no other nodes are communicating. If clear, they transmit. Yes, collisions are normal - If two nodes collide (transmit at the same time), they both back off, send a jamming signal, wait a "random" amount of time (based on their MAC address), and resend.
In a TDM, each station was assigned a time slot, and the multiplexer collected data from each station in turn. If a station had no data to send, its time slot went unused
LAN ( Local Area Network )
What is the name of the central unit that connects all network nodes on an Ethernet network?
A router, switch or hub can be at the center of an ethernet network.
What tests should be done to verify the capabilities of data network cables?
Cross pairs, Opens/shorts and Split pairs tests.
How can you physically tell if a network card is not working?
Open the computer case and make sure the NIC is securely seated in the expansion slot. Try reseating the card. Reboot and check for activity lights. If you still don't see activity, replace the NIC, and then install new drivers.
wrong. check in the back of the computer and the front of the router and make sure the lights are blinking
What is the difference or relation between DNS and HTTP?
DNS gives out IP address for domain names (among other things) so when you type Google (see related link) into the address bar your computer will resolve that to an IP address and then go to the IP address.
HTTP is a protocol for delivering webpaeges.
What enabled computer to computer transfer between companies usually over private telecom networks?
Communication protocols.
A TCP Handshake happens whenever a TCP connection is used. A TCP Handshake provides a small bit of security and is used to increase the reliability of IP communication. If the server is unavailable, too busy, or the connection between the client and the server is not reliable, the handshake will fail. The handshake will also fail if the requested port is blocked by a firewall or other filtering device.
For example, when your computer visits wiki.answers.com, it does a TCP Handshake on the standard HTTP port, port 80, data is transfered, then the connection is closed.
The client connects on port 80 with a SYN (Synchronize) and (if all goes well) the server replies with an ACK (Acknowledge) and another SYN (Synchronize). The client will reply with a final ACK (Acknowledge), completing the handshake.
A client and server going through a TCP Handshake looks like this:
Client: SYN
Server: ACK/SYN
Client: ACK
Or to put it simply, if you asked your computer to visit wiki.answers.com (port 80), the handshake would look like this:
Your Computer: Hi, wiki.answers.com! Can we talk on port 80? (SYN)
Answers.com: Hi! Sure! (ACK) Are you ready? (SYN)
Your Computer: Yep! (ACK)
The above connection is known as a 3-Way Handshake.
Once the TCP Handshake is complete, the client and server exchange data (with an ACK after every packet sent, to confirm that the packet safely reached it's destination with the correct checksum). Once the client and server are done, the handshake is finished and is closed.
Once the connection is made, the server can still actively deny the connection. The server can choose to not reply to the first SYN from the client (which will make the server appear offline) or it can complete the TCP Handshake, then deny the connection (commonly known as an "active refusal").
If you'd like to explore more about network packets, try downloading Wireshark, an open source packet capture utility. You can find it at http://www.wireshark.org.
If you want to register a domain do you have to provide a domain name server?
No.
Not if you just want the domain name, with no content of your own (no website/blog/etc.).
You can register the domain name without actually using it for anything. Some people collect domain names, some hope to re-sell them, some plan to use them some day for a website or blog, and so on.
You can add the DNS (domain name server) info later, if you want to.
If/when you want to put some content at your domain name though, you have to provide the DNS information of a hosting company.
UDP Port 7725 - What is nitrogen service?
I do not know what the Nitrogen Service itself is, but the most common application to operate on port 7725 is Faronics Deep Freeze. It uses this port to talk to the administration console.
Who has the best performance wireless router or not wireless router?
Non-wireless. Or wired as tis called! Faster data transfer.
More reliable.
More secure.
