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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 some examples of the future of input and output technology?
telemedicine, assistance with the disabled, more sophisticated touch devices, etc.
Explain three different levels of addressing in TCPIP model?
there are three level addressing
1. physical addressing - in the physical layer. it is mostly used in LAN networks
2. logical addressing - in the network layer. every host has unique ip address.it also known as IP address.
3. port addressing - It is used in multiprogramming for every process there is unique port address.
- At the hardware Ethernet or WIFI level, their is a 48 bit MAC (Media Access Control) address built into the network interface adapter. It is treated as 12 hexadecimal (0123456789ABCDEF) digits. Part of the MAC address identifies the device manufacturer. The rest is assigned by the manufacturer to individual devices/
- Each TCPIP host (computer, router, printer, scanner, etc.) has an IP (Internet Protocol) address assigned to it. This can be an IPv4 (version 4) 32 bit address or the newer IPv6 (version 6) 128 bit address which is not yet widely available. A host can only communicate with other hosts using the same version of IP address and hosts can be configured to use both addressing forms so that it can "talk"to anybody. In order to be usable on the internet the address needs to be assigned by an organization responsible for managing internet addresses or by a local internet provider. Unauthorized addresses are blocked from internet access.
- Networks and hosts can also have a name (or Domain Name) assigned to them (like answers.com). Their is a system of Name Servers that allows translation of a domain name to an one or more IP addresses so that when you want answers.com, it will reach 192.41.64.65 or another address listed as responding to that name.
Original Answer which is incorrect: Application Layer The answer is none. FTP(Layer/7: File Transfer Protocol) which is a daemon or service that lies on computers on micro, to mid, to mainframe computers all use this service. The service was designed during the original design of the 'internet' by DARPA(Defense Advanced Research Projects Agency) to transfer data between 'unlike' computer operating systems for redundancy reasons. Likewise, Microsoft Access or Microsoft Excel, which are also application levels of the OSI model or layer 7, can communicate to all levels of the OSI model. Microsoft Access can for instance talk though ODBC, then through an appropriate protocol like TCP/IP to a database anywhere in the world on a publicly addressed space. Therefore, Application layer programs, can in fact communicate through the lower six layers. I can see the argument that layer 7 does not provide services to lower layers, unless you have seen this on a protocol analyzer. When an FTP or Web(HTTP)request comes in, it travels up the OSI model from physical to application. It is dealt with on the local CPU, then sent down the OSI model from layer 7 to 1, then out the default router. You also have push functions on the internet that exist in code on many types of devices that originate on layer 7(like your uploading your camera photos through your email program), including web servers. So to argue that web servers only respond to client requests is not proper either. I hope this has cleared up this issue. The OSI model is meant to encompass all measures of communications. All are related. No exceptions except for dead packets. e
user exec mode
Select the best definition for the network term DHCP?
A protocol that lets one device on a local network, known as a DHCP server, assign temporary IP addresses to the other network devices
They come in a lot of different sizes and if you need a big one go to like radio shack or a computer store.
Of IPX SPX TCP IP and NetBEUI which is not routable?
NetBEUI is the only listed protocol that is not routable; the rest are.
Reasons why optical fibers are replacing copper cable?
I am not very good at this subject but, I do know that Fibre Optic wires contain glass and it transmits signals by putting a light signal through the wire. It is better than copper cables because Fibre Optics use the speed of light, therefore making it the fastest signal that can ever be invented.
What occurs when no ip classless is implemented on the router?
The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.
What is RM .......................................................
I hope this was the RM you were looking for.RM is a mickrosoft office softwear 2008 and its for lower primry schools on computers its really good at school we use RM computer libreay softwear for our libearry to cheak a book in.At school i like playing this game on RM colour magic its really fun.Oh and RM is the most usefull progam for primary schools in egland.
I hope i helped
Im assuming you are referring to the thinking critically question of chapt 17 for A+. The answer is to try one of the nonworking PCs in a wall jack of one of the working PCs. if it works, then its the cable. Try using a patch Cable
Why ip address start with 255.255..?
the Ip address is used to broadcast messages, such as the Emergency Broadcast message recived on your television
What are Campus Area Network Home Area Network are for?
A Campus Area Network (CAN) is used to connect buidlings across campuses of colleges or Universities. CANs' also connect buildings across a military installation as well. A CAN is actually a type of Local Area Network (LAN). It is larger than a LAN but smaller than a Metropolitan Area Network (MAN). A Home Area Network is the network used in an individual home. Home users may have all of their computers in the house connected toghether by CAT-V (twisted pair) cable or by a wireless network (actually called a WLAN - Wireless Local Area Network).
Network Layer This layer addresses the data. It adds an IP address which allows our data to flow across networks. The protocols involved in this layer are IP and IPX. Data Link Layer This layer provides the functional and procedural means to transfer data. It also corrects any errors that may occur in the Physical layer. The protocols used at this layer are media access control and logical link control.
True or False a school network is an example of WAN network?
false a school network is a a LAN or MAN depending on the size or the school
Clock speed.
Which two layers of the OSI model does a WAN operate?
According to Cisco Curriculum Semester 4 1.2.1.1 As described in relation to the OSI reference model, WAN operations focus primarily on Layer 1 and Layer 2. WAN access standards typically describe both Physical layer delivery methods and Data Link layer requirements, including physical addressing, flow control, and encapsulation.
