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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 is a collection of millions of computers interlinked to one another called?
Internet (WAN - similar to WWW)
wireless icon cross but can surf internet
How do you connect a mac to a PC with an Ethernet cable?
Plug one end of the cable into your mac and the other end into your pc. On your mac click "Go" from the menu bar. Then click connect to server. On your pc go to control panel, view network status and tasks, view status (under your wireless connection), details and then write down your IP address. On your mac type smb://[then type ip address here]. Then click connect. Make sure you have right clicked your hard drive on your pc and click share then advanced sharing. Click your hard drive on your mac and OK. You can now view and drag and drop files between your mac and pc!
The merits of Wibree are lower cost and power consumption. It can be integrated with Bluetooth Chips. The demerits of Wibree are not appropriate for huge file sharing and limited to 10 m range.
An MX record or Mail exchanger record is a type of resource record in the Domain Name System (DNS) specifying how Internet e-mail should be routed using the Simple Mail Transfer Protocol (SMTP). Each MX record contains a preference and a host name, so that the collection of MX records for a given domain name point to the servers that should receive e-mail for that domain, and their priority relative to each other.
Which tools would you need to wire an RJ45?
RJ45 do terminate network cables. The process of wiring them requires a crimping tool and a UTP cable stripper. The former for trimming the end of the cable and squeezing the RJ45 after connecting. The latter helps in stripping the jacket of the cable.
1. Because of attenuation, distortion, and noise. Atteniation is loss of signal power as it travels through the transmission medium. Distortion is caused by interactions between the signal and the transmission meddium. Noise can be generated internally or added through external interference.
network
data-link
What is the cheapest and most popular 10-Gigabit ethernet media type?
10GBASE-T is the cheapest 10Gb and BASE-T is by far the most poplar on Gigabit and growing significantly on the 10Gb side. New adapters and reduced power LAN-on-Motherboard network controllers will continue to drive the adaption of 10GBASE-T.
Twinax copper 10GBASE-T <$399 / port
9.2w / port (<80m) -- This should be sub-10watt total for dual-port controllers in 2011
10.1w / port (>80m)
CAT6 55m
CAT6a 100m
CAT7 100m
Note that 10GBASET-T is backward compatibility with 1000BASE-T and can use existing high performance structured cabling
10GBASE-DAC (SFP+ Direct-Attach Copper) < $399 / port
2.9w / port
Latency: < 1 μs
- Limited to 7 meters
- Twinax copper
10GBASE-SR (SFP+ Fiber) < $699 / port
3.2w / port
- 300 meter reach (SR)
10km reach (LR)
What is the recommended multimode fiber type per the ANSI Tia 568 C1 standard for backbone cabling?
850nm laser-optimized 50/125-micron multimode fiber
What was the first social networking site?
The first social networking site was called SixDegrees which allowed users to connect with friends which was followed by Friendster, MySpace, and now Facebook.
Which network and mask combination requires the use of a classless addressing solution?
The network and mask combination that requires the use of a classless addressing solution is 172.16.0.0/12. Classless routing is supernetting and is known as CIDR, Classless Inter-Domain Routing.
How can you networking two computers without using switch or hub what are the procedures?
The easiest way is to use a "crossover" cable. A typical Ethernet cable is wired straight-through... I.E.: pin 1 on one end is wired to pin 1 on the other end, pin 2 to pin 2, etc. Just go down to a store which sells computers, computer parts, and accessories, and ask a sales person for a "crossover" network cable.
Plug one end of the crossover cable into the NIC (network interface card) on one computer, plug the other end into the second computer. Manually assign IP addresses to both computers which are unique, but in the same subnet. For example, give one computer an IP address of 192.168.3.101, and the other, 192.168.3.102. Give both of them a subnet mask of 255.255.255.0. With the subnet mask I just gave, both computers would be on the same subnet: 192.168.3.nnn.
With file and printer sharing enabled, you would be able to copy files and share a printer between the two computers. You can also configure Internet sharing, assuming that your Internet connection is either through a USB port, dial-up modem, or connected to a computer with two (2) NIC's installed (one for Internet, the other to connect to the 2nd computer).
If you want to make a crossover cable yourself, you'll need RJ-45 connectors, a suitable crimping tool, and a length of Cat5 or higher (Cat5, Cat5e [enhanced Cat5], or Cat6) cable. For a straight through cable (hub/router to computer), here are the pin numbers and colors:
1 - white/orange, 2 - orange, 3 - white/green, 4 - blue, 5 - white/blue, 6 - green, 7 - white/brown, 8 - brown.
A store-bought cable may have the orange and green pairs reversed. Which pin is #1? Hold the RJ-45 connector in your hand, with the open end (to insert the cable) pointing down to the ground. Turn it so that the clip is away from you, the 8 teeth/pins are facing you (keeping the pins up and the open end down). The pins are numbered from 1 to 8, from left to right.
A crossover cable has pins 1 & 2 on the first end connected to pins 3 & 6 on the other end (and vice-versa: 3 & 6 to 1 & 2, respectively). I.E.: you should have: 1 - white/orange, 2 - orange, 3 - white/green, ... , 6 - green, ... on one end, and on the other end, it should be: 1 - white/green, 2 - green, 3 - white/orange, ... , 6 - orange, ... (the blue and brown pairs remain unchanged, or left disconnected). This should work for network speeds of up to 100Mbps.
Can a layer 2 switch be used in the core of a campus network?
Yes it can and the reason is because of redundancy provides for a backup route or network connection in case of a link failure. The core hardware is typically interconnected to all distribution network hardware and the objective is to ensure that the data traffic continues for the whole network even if a core networking device or link fails.
A layer 3 device such as a router.
Use tracert to see where your packets are being dropped.
What are some advantages of distance learning?
So what exactly is size learning? Indifference learning occurs when there is a detachment between the instructor and the alumnus, unremarkably due to geographical or reading concerns that forestall the pupil from present an on-campus row. Oft, electronic substance are victimized to link this gap and dispense educational tangible tho' length learning programs using printed and armored materials change existed for comfortably over a centred geezerhood. These programs acquire unremarkably been specially organized to supply individual gibe the needs and requirements that grow when learning is action expanse exterior of a traditional classroom service.
A "hop" has to do with network routing.
If you are on a particular IP network, for example 192.168.1.0, and you need to get to 192.168.4.0, data must travel through a router. A router provides interfaces to join at least two distinct networks.
If your data travels through only one router to get to a different network, that network is considered to be one "hop" away. Data moving through additional networks to get to the destination network increase the hop count by one for each router.
Thus, in the above example, if the first router had an interface attached to the 192.168.1.0 network, and another interface attached to 192.168.2.0; and then if the next router had an interface on 192.168.2.0 and one on 192.168.3.0; and then if the next router had an interface on 192.168.3.0 and one on 192.168.4.0; then the data would travel through --one, two, three-- routers to get to the destination network.
In this case, network 192.168.4.0 would be three hops away from 192.168.1.0.
