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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
The database of Internet IP addresses and their associated names?
IP addresses are assigned by a particular authority called IANA. IP address is of two types IP version 4 and version 6. The database where names corresponding to IP address are stored is called name space.
Basically, internet is a great way to connect with the entire world. Most of us use the internet as a way to connect with other people, sharing information, sharing of files, for entertainment, socializing, and many other things that could be beneficial for us.
What is a worldwide group of connected computer networks?
The internet (capitalized) is the global network of linked computer networks. Uncapitalized "internet" is usually some limited group of linked computer networks under the control of a single entity - and THE Internet is certainly not under the complete control of much of anyone!
What is the function of network cards in computer?
- A Network interface card, NIC, or Network card is an electronic device that connects a computer to a computer network, usually a LAN. It is considered a piece of computer hardware. Today, most computers are equipped with network cards.
How do you tell which wireless router is best?
You need to find out, what kind of wireless adapter you have (b, g, n). When you know the type of wireless network your adapter supports, you can choose the router you need. So if you have an adapter which supports, lets say, wireless G, you need to get a router with support for wireless G (and even higher, it's good for future upgrade) networks.
Which octets are used for the network address and for host addresses in?
Assuming we are talking IPv4, the split between network and host is determined by the subnet mask. In binary, where there is a "1" it is network, where there is a "0" it is host. A+ pg. 870: A: 1st octect: Network; 2nd,3rd,and 4th: Host B: 1st and 2nd octects: Network; 3rd and 4th octets:Host C: 1st,2nd,3rd octects:Network; 4th octect: Host
Is 802.11a compatible with 802.11b?
It depends entirely on when they were made. If it was within the year it came out then you probably have a 50/50 chance.
Most of the older b ONLY devices probably not. The dual b/g may have a better chance of it being compatible as it was around that time so much better chance. The b/g/n capable should have it already built in.
Which expansion slot is used for a video card?
During this time period you can install the Video capture card in a few difefrent Expoansion Slots .. They are as follows :
Type 1 EISA Amd VEriosn Similar to Intel Veriosn But more functionally Accurate wiht Communitcation of 32bit system with older 16bit Expansion card built design before Next Phase of 32bit board desgin for Newer PCI-E V 2.0 Slot and The next to followthe next on posted below.
Type 6 PCI-E V2.0 This VEriosnof The PCi-E is Purely 32bit Communicating wiht the Fully 32 Bit Design GRaphic and or Other Devioce Desgin for Vista nad more for those wihtin that of The Newer Windows 7 RTM of this Year .
Type 7 IEEE ( 1394 ) V 1.0- 2.0 This was at one part an attempt to militarize the Connecion of the interal Network of Large and Smaller companies .. There was how a few rare companies that tried to design hardware to finction in this Socket Port on the Now Present Use For Camera/ Video System Device within the 32bit board of this time .
Type 8 Usb V1.0 { If Adpater is built into a Usb Dongle / Stick devise type .} This is presently use today and is very slow within a 32bit motherboard and CPU designed sysatem and have many and or multiple device desgin for it proper use and functionality.
Typ 9 USB v 2.0 { If unit is built into a "Dongle / Stick Similar to A Thumb Drive r or other device with Femal USB port attached " This Veriosn Usb used Super Compression of communication to macth speed and data boosting of memory when atttached to a 32bit system of 2010 " Today's Present Standard " Via Operating System or Bios Setting . This would be the Last Way Presently Release to the Public " Home Computer End-User " For Usage or connection of A Video Capture card / Devioce within a Computer System or tady or yesterdays Computer Systems.
What is a medium in networking?
The main transmission media used in networking are:
- Conducting cable, usually copper; they transmit electrical signals.
- Optic fiber; they transmit light signals.
- The air, walls, whatever; transmitting radio waves in wireless networks.
The main transmission media used in networking are:
- Conducting cable, usually copper; they transmit electrical signals.
- Optic fiber; they transmit light signals.
- The air, walls, whatever; transmitting radio waves in wireless networks.
The main transmission media used in networking are:
- Conducting cable, usually copper; they transmit electrical signals.
- Optic fiber; they transmit light signals.
- The air, walls, whatever; transmitting radio waves in wireless networks.
The main transmission media used in networking are:
- Conducting cable, usually copper; they transmit electrical signals.
- Optic fiber; they transmit light signals.
- The air, walls, whatever; transmitting radio waves in wireless networks.
Where is a straight UTP cable used?
UTP stands for 'unshielded twisted pair'. These cables are usually found in Ethernet networks and telephone lines. They are also sometimes found as part of a security network.
What is the average pricing of server colocation?
It costs $999.00 for the OS. That's just a standard edition of server 2008. Then the actual machine, for something half decent you'd probably need to spend about $600.00
So just for the actual bare minimum server, your looking at about just over $1,500.00 And again that's before you start putting your Exchange ($699.00) or ISA (you dont want to see the price of this) or sharepoint ($350.00) on it.
Then if you cant set-up the server yourself, most professionals charge between $65 - $120 per hour (depends on where you live and how "professional" the person is). And your probably looking about 3 - 4 hours, depending on what you want done.
During the early years of our modern computer era, very few standards and protocols existed between various manufacturers. However, as time went on and computer technology continued to improve and become more widespread, it became apparent that standards would be necessary to ensure compatibility. This was especially true with regard to networks, and networking technology. Since the main purpose of a network is to share information, a standard that governs how this information is formatted, transmitted, received and verified would make it possible for information to be shared openly, even when dealing with dissimilar networks.
This need for a standard means of implementing open communications led the ISO and ANSI to develop the seven-layer network communications model known as Open Systems Interconnect. By providing guidelines regarding the way network equipment should be manufactured and how network operating systems communicate on a network, the OSI model became the common link that allows data to be transmitted and exchanged reliably. Although it does not actually perform any functions or do any of the actual work, the OSI model defines the way things should be done by the software and hardware on a network so that communications can take place between two computers or nodes.
In this way, the OSI model provides a universal set of rules that make it possible for various manufacturers and developers to create software and hardware that is compatible with each other. This makes for organized communications. As I thought about this, I related it to the freeways that connect the various states of the mainland U.S. Because all of these freeways were constructed with the same set of standards regarding the width of each lane, the proper side that a person should drive on, the speed at which they should travel, and so on, people can comfortably drive across the country in an organized and efficient manner and car manufacturers are able to design cars within these guidelines as well. On the other hand, if each state had devised its own set of rules, each differing from the other, not only would there be a lot more chaos on the roads, but also car manufacturers would have a hard time designing vehicles that would be compatible with each state's roads. To me, this illustrates the importance of the OSI model with respect to network communications. Not only is it the foundation for all network communications today, but also because it is such a fundamental part of these communications, it becomes very apparent to me that it is very important for a network technician to understand the OSI model in full detail.
The OSI model is made up of the following layers: the physical, data link, network, transport, session, presentation and application. Together, these seven layers are collectively referred to as a stack. As a node receives data, each layer starting with the physical layer extracts the various portions of the packet and this process works its way up to the application layer. When data is sent, it begins at the application layer and travels down to the physical layer. The information is pushed to the next layer of the stack by means of commands called primitives. Each layer uses a peer protocol to encode the information, which ensures that the same layer on the receiving node will be able to understand the information.
How do you use ipconfig in windows 2000?
type "ipconfig" from a command prompt. (Start > Run > CMD) The basic command will display the essential IP address info for each network adapter: IP Address, Subnet, and Gateway There are several helpful switches. The most common: /all--displays complete IP configuration, such as DHCP servers, WINS Servers, DNS Servers /release--releases the lease on an IP Address assigned by DHCP /renew--requests an IP Address from the DHCP Server /?--returns a complete list of switches and syntax for this command
How can you ensure data integrity can be maintained in your database?
Data integrity is preserved by encapsulating unit-of-work actions, such as a transfer from one account to another, in a transaction.
The database implementation ensures that either all of the transaction commits, or none of it commits. In the event of a failure and restart of the database, all incomplete transactions are uncommitted, i.e. rolled back.
While the transaction is in-flight, any query to data elements used by the transaction reliably retrieve the value they allhad prior to transaction start. Also, any transaction attempting to lock any of those elements for other unit-of-work actions are forced to wait until the first transaction is complete.
How many IP addresses does the router have?
A router may have multiple addresses depending on the number of interfaces to other networks. For a router to function effectively it must have at least 2 addresses, but some routers may have more.
They Should only have one.
Is it illegal to have more than one email address?
It is legal to have as many e-mails as you want. Just don't use those e-mails for something illegal like spamming.
Which three statements are true regarding router-on-a-stick inter-VLAN routing (Choose three.)?
#1, #3, #5
What The most important different between hub and switch?
There really aren't five main differences between a hub and a switch; the main difference is that a signal is repeated across all ports in a hub, and only to the specific port in a switch.
it is a network data communication system where each of the device connected with it wait for their time to communicate. when they have the token, they got to communicate or sent transmission.
What are the types of LAN technologies?
Answer by Techsupport
There are different types of Media Access Control methods in a LAN, the prominent ones are mentioned below :
=> Ethernet - Ethernet is a 10Mbps LAN that uses the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol to control access network. When an endstation (network device) transmits data, every endstation on the LAN receives it. Each endstation checks the data packet to see whether the destination address matches its own address. If the addresses match, the endstation accepts and processes the packet. If they do not match, it disregards the packet. If two endstations transmit data simultaneously, a collision occurs and the result is a composite, garbled message. All endstations on the network, including the transmitting endstations, detect the collision and ignore the message. Each endstation that wants to transmit waits a random amount of time and then attempts to transmit again. This method is usually used for traditional Ethernet LAN.
=> Token Ring - This is a 4-Mbps or 16-Mbps token-passing method, operating in a ring topology. Devices on a Token Ring network get access to the media through token passing. Token and data pass to each station on the ring. The devices pass the token around the ring until one of the computer who wants to transmit data , takes the token and replaces it with a frame. Each device passes the frame to the next device, until the frame reaches its destination. As the frame passes to the intended recipient, the recipient sets certain bits in the frame to indicate that it received the frame. The original sender of the frame strips the frame data off the ring and issues a new token.
=> Fast Ethernet - This is an extension of 10Mbps Ethernet standard and supports speed upto 100Mbps. The access method used is CSMA/CD .For physical connections Star wiring topology is used. Fast Ethernet is becoming very popular as an upgradation from 10Mbps Ethernet LAN to Fast Ethernet LAN is quite easy.
=> FDDI (Fiber Distributed Data Interface) - FDDI provides data speed at 100Mbps which is faster than Token Ring and Ethernet LANs . FDDI comprise two independent, counter-rotating rings : a primary ring and a secondary ring. Data flows in opposite directions on the rings. The counter-rotating ring architecture prevents data loss in the event of a link failure, a node failure, or the failure of both the primary and secondary links between any two nodes. This technology is usually implemented for a backbone network.
What are the applications of twisted pair wire?
One application is when signal isolation is required. Twisted pair wire tends to self-shield for differential signals. This is because external interference induces equal currents in both conductors due to the symmetry of the twists. The differential input then cancels out the common-mode (equal on both wires) noise, allowing the desired differential signal to pass. One interesting example of this is UTP (CAT5, CAT6, etc.) cable used for ethernet cabling. If you strip the jacket off of a length of cable, you will notice (obviously) that the pairs are twisted. Look closely though, and you will notice that each pair is twisted with a different twist-per-inch than the other. If each pair had exactly the same twist, then the pairs cold 'line up' with each other, allowing crosstalk between the pairs (very bad). By varying the twist rate, crosstalk is minimized. In fact, the different twists are prime numbers, which means they never match up anywhere in the cable! Is that cool or what!
What is public ip and private ip address?
The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private internets (local networks): 10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
Also, IP addresses in the range of 169.254.0.0 -169.254.255.255 are reserved for Automatic Private IP Addressing. These IP's should not be used on the Internet. I usually use 192.168.0.1, 192.168.0.2, etc. and a subnet mask of 255.255.255.0 when assigning static IP addresses to computers on a small Local Area Networks (LANs). If a DHCP server is also on the LAN it's scope (range of IP addresses that it can assign to computers on the LAN set to obtain their IP addresses automatically) should be adjusted so it does not interfere with locally assigned static IP addresses.
