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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 the different between star network bus network and ring network?
It is a neighborhood in which all hubs are straightforwardly associated with a typical focal computer.Every workstation is in a roundabout way joined with each other through the focal PC. In some star systems, the focal PC can likewise work as a workstation.
It is a system topology in which every hub join with precisely two different hubs, shaping a solitary constant pathway for signs through every hub a ring. Information head out from hub to hub, with every hub along the way taking care of each parcel.
Layer 3 switch
What are characteristics of a computer network?
When you have a network containing at least two interconnected computer devices, you can call it a computer network. The main purpose of this computer network is to collaborate and perform communication tasks as well. Smart home technology is a perfect example of computer network. For more details visit Best Satellite Internet Provider and Electronic Installer In Pontotoc MS or call 662-509-57772 now.
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Difference between connection - oriented and connectionless services?
Two distinct techniques are used in data communications to transfer data. Each has its own advantages and disadvantages. They are the connection-oriented method and the connectionless method:
- Connection-oriented Requires a session connection (analogous to a phone call) be established before any data can be sent. This method is often called a "reliable" network service. It can guarantee that data will arrive in the same order. Connection-oriented services set up virtual links between end systems through a network, as shown in Figure 1. Note that the packet on the left is assigned the virtual circuit number 01. As it moves through the network, routers quickly send it through virtual circuit 01.
- Connectionless Does not require a session connection between sender and receiver. The sender simply starts sending packets (called datagrams) to the destination. This service does not have the reliability of the connection-oriented method, but it is useful for periodic burst transfers. Neither system must maintain state information for the systems that they send transmission to or receive transmission from. A connectionless network provides minimal services.
What are the similarities and differences between ssh and telnet?
FTP and Telnet are similar in that they are defined as OSI layer 7 (application) protocols.
They are different in that they use different ports for sending and receiving messages and are used for different purposes. FTP is used to sending and receiving files across a network. Telnet is used to send commands remotely to another network device.
How do you find your router ip address?
I'm assuming you use windows, and the router is up and running and in use. If these are both true, type "ipconfig" from the command prompt. This will show up:
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 192.168.0.100
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
"default gateway" is probably your router's address.
How do you connect multiple PCs using a single Cat5 cable?
Easy Setup:
Connect 2 Computers Directly Using Crossover Cable
http://www.home-network-help.com/crossover.HTML
you will need a crossover cable to do this. pairs are switched allowing communication to occur without a hub or router
TAKE THE CAT5E CABLE AND TWO JACKS.YOU WILL FIND 4 PAIRS OF WIRES. LIKE OW-O,BLUEW-BLUE,GREENW-GREEN,BROWNW-BROWN. IN THIS THERE ONLY FOUR WIRES ARE NEEDED. supoose you have crimped one side like this ow-o-gw-g-blw-bl-brw-br.then other end will be gw-bl-ow-bl-o-brw-br.
ow-orange white o-orange blw-blue white bl-blue grw-green white gr-green brw-brown white br-brown COLUR CODE : 1----3 2----6 3----1 4----4 5----5 6----2 7----7 8----8
And- Both computers need to have a NIC(Network Interface Card) installed.
- The computers need to have different IP addresses in the same IP subnet. This gets set in Network Properties - TCP/IP Properties. Easiest would be to set one at 10.0.0.1 and the other at 10.0.0.2, both with a netmask of 255.255.255.0
SOMTIMES
A NIC will have the crossover setting in the device driver
What purpose does a host name serve on the router?
Add the command no auto-summary on all routers.
Change the network statements to include a wildcard mask.
Adjust the EIGRP hello timers to account for the network delay.
Add the command eigrp log-neighbor-changes on all routers.
What command gives the hop count?
Traceroute is the program that shows you the route (or hops) over the network between two systems, listing all the intermediate routers a connection must pass through to get to its destination.
The command used will depend on the OS you're using.
If you're on a Unix system, including Mac OS X, run a traceroute at the command line like this:
traceroute server.name
If you're using Windows, the command is called tracert. Open a DOS window and enter the command:
tracert server.name
NOTE:
(sever.name should be either the computer name, IP address or domain name)
What wireless ethernet standards operate at 54mbps?
People often confuse bandwidth and throughput. 802.11a and 802.11g are the two common standards that have a maximum bandwidth of 54Mbps. The actual maximum throughput you will see on a 54Mbps link will be 20-25Mbps.
A device that forwards data packets from one local area network (LAN) or wide area network (WAN) to another. Based on routing tables and routing protocols, routers read the network address in each transmitted frame and make a decision on how to send it based on the most expedient route (traffic load, line costs, speed, bad lines, etc.). Routers work at layer 3 in the protocol stack, whereas bridges and switches work at the layer 2. Routers are used to segment LANs in order to balance traffic within workgroups and to filter traffic for security purposes and policy management. Routers are also used at the edge of the network to connect remote offices. Multiprotocol routers support several protocols such as IP, IPX, AppleTalk and DECnet. Routers can only route a message that is transmitted by a routable protocol such as IP or IPX. Messages in non-routable protocols, such as NetBIOS and LAT, cannot be routed, but they can be transferred from LAN to LAN via a bridge. Because routers have to inspect the network address in the protocol, they do more processing and add more overhead than a bridge or switch, which both work at the data link (MAC) layer. Most routers are specialized computers that are optimized for communications; however, router functions can also be implemented by adding routing software to a file server. For example, the NetWare operating system includes routing software that can route from one subnetwork to another if each one is connected to its own network adapter (NIC) in the server. The major router vendors are Cisco Systems and Nortel Networks. Within an enterprise, routers serve as an internet backbone interconnecting all networks. This architecture strings several routers together via a high-speed LAN topology such as Fast Ethernet or Gigabit Ethernet. Within the global Internet, routers do all the packet switching in the backbones. Another approach within an enterprise is the collapsed backbone, which uses a single router with a high-speed backplane to connect the subnets, making network management simpler and improving performance. In older Novell terminology, a router is a network-layer bridge. Routers also used to be called "gateways." For more understanding of how the network layer 3 works within the protocol stack, see TCP/IP abc's. See layer 3 switch, route server, router cluster and routing protocol.
What type of connections is a Port 443 used for?
Port 443 is used for Hypertext Transfer Protocol Secure connections, whereas port 80 is used for Hypertext Transfer Protocol connections. Hypertext Transfer Protocol Secure connections are more secure and can protect against attacks.
What is the management port on a router called?
Typically all other protocols are blocked on this interface and it is normally placed on the management network and is separated from all other networks passing through the router.
Can you use a 512MB 2Rx16 PC2-5300S-555-12 in your Dell Inspiron 9300?
The Dell Inspiron 9300 takes DDR2 PC2-5300 SODIMMs. It has two slots, each of which can hold up to 1GB, for a total of 2GB. This memory should work in your laptop with no issues, however, for performance issues, it is recommended to have the same memory size and type installed in each slot.
Does Ankle Weights Make You Run Faster?
yes they do as they make your ankle muscles bigger in size and they can then help you run faster with more weight!!! Especially with DARREN(160 tonnes) on your back !!!! loooool!! yes they do as they make your ankle muscles bigger in size and they can then help you run faster with more weight!!! Especially with DARREN(160 tonnes) on your back !!!! loooool!!
What is the standard of a protocol?
STANDARD
(computer science) The ability of one device to accept data handled by another device without conversion of the data or modification of the code.
(immunology) Ability of two bloods or other tissues to unite and function together.
(ordnance) In ammunition, the ability of a given material to exist unchanged under certain conditions of temperature and moisture when in the presence of some other specific material.
(pharmacology) The capacity of two or more ingredients in a medicine to mix without chemical change or loss of therapeutic effectiveness.
(systems engineering) The ability of a new system to serve users of an old system.
PROTOCOLS
The forms of ceremony and etiquette observed by diplomats and heads of state.
A code of correct conduct: safety protocols; academic protocol.
What are the main functions of each layer of OSI model?
layer 7- Application layer layer 6- Presentation layer layer 5- Session layer layer 4-Transport layer layer 3-Network layer layer 2- Data Link layer layer 1- Physical layer
Which of the following is considered a Layer 2 device?
Switches are generally considered layer 2 devices, but many are capable of operating at layers 3, 4 or higher.
Most hubs are amplifying the electrical signal; therefore, they are really repeaters with several ports. Hubs and repeaters are Layer 1 (physical layer) devices.
What Factors that affect security of a network?
Following factors can affect performance of a network
1 Disturbance in communication media
2 mismatch in Protocols
3 Power failure
4 Server failure
5 Congestion in networks
6 Repetitive demand of same data packets
7 Virus or spy-ware or Mal -ware attacks
Number of simultaneous users Type of transmission medium
Page 256 Lesson 7, sixth paragraph down.
The primary function of the Web Server is to send and receive text-based messages containing requests and replies.
What is the he communications protocol used by the World Wide Web?
Http. HyperText Transport Protocol, the communications protocol used by the
World Wide Web
What is the address classes in IPv4?
There are three "classes" of IPv4 subnets. Essentially, these refer to which "octet" is set.
Class A: A /8 network (netmask 255.0.0.0) - the first octet is set and the rest belong to you. i.e. 128.x.y.z. You have 256x256x256/2^24 IPs available here.
Class B: a /16 network (netmask 255.255.0.0) - the first two octets are set and the rest belong to you, i.e. 128.67.y.z. You have 256x256/2^16 IPs available.
Class C: a /24 network (netmask 255.255.255.0) - the first three octets are set and the use of the fourth is yours, i.e. 128.67.4.z. You have 256/2^8 IPs available.
It's possible your question may have meant types of addresses used (for routing purposes). There are broadcast addresses (send a packet to everyone on my local network), unicast (basically point-to-point connections, the most common) and multicast (senders/receivers communicate through a multicast IP, sending one packet to many destinations with just one transmission).
What is the differences between hub and switch in networks?
switches does not have the database...much smarter than a hub.
That is short for Universal Plug and Play.
That is short for Universal Plug and Play.
That is short for Universal Plug and Play.
That is short for Universal Plug and Play.
