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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 peer review and why is it important?
It is when a peer reviews your work and gives you feedback on that work.
What is the preferred wireless encryption technique if the wireless clients support it?
At least WPA encryption is recommended because WEP keys can be easily cracked in minutes leavinf your wireless connection
Susceptible to attacks.
Fiber Optic Patch Cord is used to interconnect Transmission equipment to the Fiber optic patch panel.
we got 2 kind of fiber optic patch core according to the mode: single mode patch core (SM） and multi-mode patch core(MM).
and several kind according to the connector: sc, fc, st, lc patch core etc.
How many ports are there in a network switch and how are they connected?
There are typically 5 to 24 ports on a network switch, though real high end switches can house more.
Internally the ports are connected with copper wires.
Give the correct cable type for 100BasedT network?
10BASE-T can use CAT3 cabling or better, while 100BASE-T requires CAT5 or better (such as CAT5e or CAT6).
How can you hide your IP address?
I will answer this on the premise that the question means, "How can I surf the web and hide my IP?" What you need is an anonymizer. This is effectively a proxy that you connect to and the proxy does the actual web surfing, thus the proxies IP is the one that shows up as doing the surfing. Also there are open terminal servers that can be used to anonymously surf the web.
What is the Principle of optical fiber?
Fiber optic cables containing silica called filamentous crystal crystalline silica is actually the main component of these filaments heap on the inner wall can be attached to the wire with the wire bent over bent when the optical signal from the wire the optical signal to one input of the specular reflection on the surface of the silica on the principle of reflective transmission until it reaches the other end of the optical signal conductor recognizer so far.
Fiber is divided into the following two categories:
1) transfer points modulo class
Transfer points modulo class of single-mode fiber and multimode fiber. Single-mode fiber core diameter is small, at a given operating wavelength only in single-mode transmission, the transmission frequency bandwidth, transmission capacity. Multimode fiber is given in the operating wavelength, can be transmitted simultaneously to a plurality of mode optical fiber. Compared with single-mode fiber, multimode fiber transmission performance is poor.
2) refractive index distribution type
Refractive index distribution type optical transitions can be divided into optical fiber and tapered optical fiber. Hopping optical fiber core refractive index and the refractive index of the protective layer is a constant. And a protective layer in the core of the interface, the refractive index changes stepwise type. Graded refractive index of optical fiber core increases as the radius decreases according to certain rules, and the protective layer of the core is reduced to the junction of the refractive index of the protective layer. Similar to the refractive index of the core changes parabola.
IPv4, The 32 bit Internet address scheme is still in use and most networks, whether or and off the internet, are still using IPv4 and have not yet switched over to the newer IPV6. This is because their networks still work with IPv4; they feel there is no need to change what is not broken; not all equipment is capable of being switched to IPv6, and there may not be sufficient expertise to use IPv6. Also many internet service providers (ISPs) are not yet supporting it.
Although we are running out of assigned IPv4 addresses, we can continue with the current scheme for a while longer using Classless Inter-Domain Routing (CIDR) which redistributes some unused class A and B Network addresses as smaller networks. We can also use Network Address Translation (NAT) to allows multiple machines in a local network to use a single external IPv4 address.
The need for IPv6 is important to new Internet users who need a large number of externally visible internet addresses and the above methods are not sufficient. The use of the Internet-of-Things (IOT) when or if it ever becomes globally implemented and accepted will require a tremendous number of IP addresses and only IPv6 will be able to supply the required number of internet addresses for such personal devices.
How do you connect two computers to share processing power?
The most common setup for two or more computers to share resources is what is known as a "Beowulf cluster." Beowulf clusters are a collection of computers running Linux, and sometimes Solaris and FreeBSD, networked together, with one computer serving as the "main" workstation. Several Linux distributions exist to set up a Beowulf cluster. Some are as easy as booting the computer from a LiveCD, and selecting whether you want it to be the main terminal, or simply another node.
Which field of ip address is changes from router to router?
The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.
The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.
The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.
The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.
What the diffirence between Optical fiber cable G652 and G655?
G 655 used fiber long distance SM fiber G655, and G652 short distance used, G652 Nonzero fiber
Why fiber optic cable is better than twisted-pair and coaxial cable?
Because fibre sales having a high capacity and maximum bandwidth compared with twisted pair cable and coaxial cable. It's your choice to buy it from online stores or offline. if you want it online many websites offer online fibre cables. Check fibre sale website its good I also use this product.
What is Network and Host portion in an IP address?
Here are 3 facts about the network portion of an IPV4 address.
1. identical for all hosts in a broadcast domain
2. varies in length
3. is used to forward packets
Which identifiers is contained in the header of the layer 2 ethernet frame?
physical source and destination addresses
physical source and destination addresses
This IP address can work with a variety of different subnet masks.
This IP address can work with a variety of different subnet masks.
This IP address can work with a variety of different subnet masks.
This IP address can work with a variety of different subnet masks.
What are the three criteria necessary for an effective and effecient network?
Reliability is one thing that is necessary for an effective and efficient network. Other criteria that must be met for an effective and efficient network includes security, and it must also perform well.
Which cable is used to connect computer to computer?
There are many ways to transfer information between computers, iPods, or any other storage device. The way in which you do it depends largely on your own experience. knowledge, computer, and the tools available to you. Things such as Flash Drives, compact disks (CD's), Cross over cables, and File Transfer Protocols (FTP) are all tools that you can use to transfer files. This is a brief over view of the different forms of file transference.
The first way to transfer files is through USB Drives; often called jump or flash drives. They come in a variety of sizes from 124 megabytes to several gigabytes. This is a relatively simple process and does not require high levels of knowledge. Make sure your drive can hold the files you are transferring so you don't try moving a file that is too large. It wont let you do this and you will end up either buying a new drive or having to use an alternate method of transference.
The second method I listed was CD's. This is not limited to just compact disks and may include, DVD's, floppy disks, or any other form of removable media. Common CD's will tell you how much information they hold, which on average is 700 megabytes worth of information; DVD's can hold at least 4.7 megabytes. They come in formats such as CD-R. CD-RW, DVD-R, or DVD-RW. If a disk is followed by "-R" it stands for readable, and once the information is on there you can not remove it. If a disk is followed by "-RW" it means that it is readable and writable, meaning you can change the information that is written to the disk. To use this method you will need to have a CD drive that is capable of writing on these kinds of disks. Most computers bought today, if not all, that have a CD drive will be able to perform this service to you. This is relatively simple but can be time consuming.
The third method in the list is cross-over cables. These are specific hard wire cables that allow two computers to communicate and send information between one another. The cables fit into your network jack on the motherboard of your computers and requires both computers to be connected. This requires some networking skills from the user. You must be able to set up a file sharing connection with your LAN port. Windows does a good job of giving you a "Wizard" to get it set up with little difficulty for the user.
The last method is a File Transfer Protocol. This again requires for the two computers to be networked, but not directly. One computers must create a shared folder and put information in that folder to be shared on a network. You MUST be very cautious when using this method of file transference. It opens your shared information to being seen by hackers if they are "sniffing" your network. There are alternative programs that you can use to perform these operations, but they are not hack proof.
These are the multiple ways in which you can transfer files between computers. There are probably more ways than listed, but these are more common forms of sharing information. I have used all of these listed methods and know how they work. Good luck in transferring your files.
How can the OSI model be a useful reference when troubleshooting network problems?
Troubleshooting using the OSI model requires a working knowledge of the various layers and the actions undertaken at each. the above link is a resource i use frequently when probing issues on customer networks designed using the OSI framework.
Can you show me a picture of a moden and router?
I have placed a link below. This link is 1 of many examples of a modem.
Which layer is the network support layer?
Physical, Data link and Network layers make the Network Support layers.
Why do you need for networks of computers in education?
Networks are important for schools because they allow students and teachers access to the internet. Of course students would not have as many privileges as a teacher because students don't need to access administrative programs and features as teachers may. Networks allow teachers to collect marks and share them on the network with other teachers, but not only marks but attendance records and other stuff teachers may need.
For a school the best type of network would be a WAN (Wide Area Network).
If it were a collection of schools or campuses I would recommend a MAN (Metropolitan Area Network).
I hope this answered your question =)
Can i Use 2 wireless routers on one modem?
You might be better off setting one router to broadcast and one to retrieve.
How many hosts addresses can be assigned on the 10.0.0.0 with a mask of 255.255.255.0?
254 -- 24 bits of the 32 bit format are fixed (10.0.0 is fixed, so in binary that's 00001010.00000000.00000000) leaving you with the final octet to work with. This octet will yield 256 unique values, but 0 (00000000) and 255 (11111111) are reserved so only 1(00000001) through 254 (11111110) are valid hosts.
