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Local Area Network
Questions concerning the setting up, troubleshooting and operation of wired LANs used by businesses and other organizations
4,003 Questions
What are the advantages of a domain over a workgroup?
All computers are peers; no computer has control over another computer.
Each computer has a set of user accounts. To use any computer in the workgroup, you must have an account on that computer.
There are typically no more than ten to twenty computers.
All computers must be on the same local network or subnetwork.
One or more computers are servers. Network administrators use servers to control the security and permissions for all computers on the domain. This makes it easy to make changes because the changes are automatically made to all computers.
If you have a user account on the domain, you can log on to any computer on the domain without needing an account on that computer.
There can be hundreds or thousands of computers.
The computers can be on different local networks.
In most business LANs which connector is used in twisted pair networking cables?
You use a Rj-45 connector with twisted-pair cabling in an Ethernet LAN. Rj-45 is a connector with a 4 5 wiring sequence.
Why are port numbers included in the tcp header of segments?
So the destination host knows what port to send it to. If the destination just takes a guess as to what port to send it to and sends an RDP packet to port 80 what do you think is going to happen?
When a client requests access to a resource in a DFS the server responds with?
A referral to the file's actual location.
Definition: The term WWW refers to the World Wide Web or simply the Web. The World Wide Web consists of all the public Web sites connected to the Internet worldwide, including the client devices (such as computers and
cell phones) that access Web content. The WWW is just one of many
applications of the Internet and computer networks.
The World Web is based on these technologies:
•HTML - Hypertext Markup Language
•HTTP - Hypertext Transfer Protocol
•Web servers and Web browsers
HTML
HTML is a computer language devised to allow website creation.
These websites can then be viewed by anyone else connected to the Internet.
It is relatively easy to learn, with the basics being accessible to most
people in one sitting; and quite powerful in what it allows you to create.
It is constantly undergoing revision and evolution to meet the demands and
requirements of the growing Internet audience under the direction of the
» W3C, the organisation charged with designing and maintaining the language.
The definition of HTML is HyperText Markup Language.
•HyperText is the method by which you move around on the web - by clicking on special text called hyperlinks which bring
you to the next page. The fact that it is hyper just means it is not linear - i.e. you can go to any place on the Internet
whenever you want by clicking on links - there is no set order to do things in.
•Markup is what HTML tags do to the text inside them. They mark it as a certain type of text (italicised text, for example).
HTTP
HTTP - the Hypertext Transfer Protocol - provides a standard for Web browsers and servers to communicate. The definition of HTTP is a technical specification of a network protocol that software must implement. HTTP is an application layer network protocol built on top of TCP. HTTP clients (such as Web browsers) and servers communicate via HTTP request and response messages.
The three main HTTP message types are GET, POST, and HEAD.
Web browsers and web servers
Web browsers
Web browsers allows the user to access the information by traversing these hyperlinks. Web browser also executes the HTML code that is why the appearance of a wepage on different web browser is different. Generally web browsers are used for world wide web access but they can also be used for content retrieval in file systems. A list of popular web browsers include Internet
Explorer, Mozilla Fire Fox, Opera, safari, AOL .
Web servers
A Web server is a system program that accepts request from the client (web browser) and after its interpretation gives back the response Beside this a web server can also provide the following facilities
Authentication: The web server checks the request before sending back the response.
Content Compression : It can also cut off the size of the response content without altering the meaning.
Virtual host: It can also link various web sites using only one IP address
Support for file: IT provides support to large files.
Bandwidth throttling: To lower down the response time of any request and to serve a number of clients at any instant of time.
Web server also maps the path of the Uniform Resource Locator to:
Which network topology is the best one?
The best topology is ring topology.
Star is the next best after ringr, and then bus, which is pretty old, but not too expensive.
Full mesh topology is theoretically the best since every device is connected to every other device, thus maximizing speed and security. These, however, are quite expensive to install. The next best would be tree topology, which is basically a connection of stars.
Maximum number of hosts class c Address?
254 - a class C subnet uses 8 bits for the hosts and 0 and 255 are reserved.
Can you move Microsoft Works calendar from one computer to another computer?
if you have it installed on another computer then yes some where there sould be a export link or button
What are two main type of LAN?
- LAN - Local Area Network
- WLAN - Wireless Local Area Network
- WAN - Wide Area Network
- MAN - Metropolitan Area Network
- SAN - Storage Area Network, System Area Network, Server Area Network, or sometimes Small Area Network
- CAN - Campus Area Network, Controller Area Network, or sometimes Cluster Area Network
- PAN - Personal Area Network
- DAN - Desk Area Network
What is the difference between VLAN and LAN?
There is no difference between LAN and Ethernet cables. These cables are used to relay internet service to electronic devices equipped to utilize the internet service.
What is difference between Transport layer and data link layer?
The data link layer handles communication between systems on the same local network. The network layer handles communication between systems on different local networks and allows those packets to be routed between the two.
The data link layer would allow two machine on network a to talk to each other or two machines on network b to talk to each other. This communication takes place using the physical/MAC addresses of the machines.
The network layer is what allows a machine on network a to talk to a machine on network b using logical address like IP addresses.
Go to start then run. Here you will either need to type in command and press enter. Once you do this you should see the command screen. Once you are here type in ipconfig and press enter, you should see the default gateway address there after pressing enter. Hope this helps! From Ryan @ Edutech Plus
Which topology uses a central device for point-to-point connections to other devices?
A star topology; a network topology in which endpoints on a network are connected to a common central device by point-to-point links.
What device can you use to connect two or more computers with a single cable modem?
You can use a router, either wired (Ethernet) or wireless to connect two or more computers with a single cable modem. You would need either Category 5, 5e, or Category 6 Ethernet cables to do this. Also, you may set up a wireless Local Area Network (otherwise known as LAN) if your type of router supports that and your computer(s)/devices support it.
How many subnets can you have in a class C network with a 26 bit mask?
A Class C IP address has 24 bits for network and 8 bits for host. So to have a subnet mask of 26 bits, you will need to use 2 bits from host part.
Number of subnets is given by the formula : 2^(no. of bits used from host part).
Hence number of subnets in this case would be = 2^2 = 4.
For e.g. if the class C IP address is 200.168.210.0
the 4 subnet addresses would be :
11001000.10101000.11010010.00000000 = 200.168.210.0
11001000.10101000.11010010.01000000 = 200.168.210.64
11001000.10101000.11010010.10000000 = 200.168.210.128
11001000.10101000.11010010.11000000 = 200.168.210.192
Note: The digits in bold are the mask bits.
What is the purpose of a gateway?
Gateway is software placed in the router. Its function is protocol translation. When we need to connect two networks based on different protocols, then gateway is used by default. It acts as an entrance To see the default gateway of your system in cmd (command prompt), type "ipconfig." It shows the default gateway.
What is the default subnet mask for the IP address 72.224.56.62?
Since this is a Class C address, the default network mask is 255.255.255.0.
Since this is a Class C address, the default network mask is 255.255.255.0.
Since this is a Class C address, the default network mask is 255.255.255.0.
Since this is a Class C address, the default network mask is 255.255.255.0.
Which wire received and send data in UTP cables?
The white/green (stripy green) transmits data using pin 1 & 2. The white/orange (stripy orange) receives data using pin 3 & 6.
In TIA/EIA T568A standard pin 1 & 2 or pair 3 transmits data while pin 3 & 6 receive data. In TIA/EIA T568B its the other way around because the order of the wires is changed, so pin 1 & 2 receive data while pin 3 & 6 transmit data.
The colors will vary depending on where you buy your cable from.
What is a connectionless protocol?
Connectionless Protocols: These protocols do not establish a connection between devices. As soon as a device has data to send to another, it just sends it. Answer:
A Connectionless Protocol is a data communication method in which communication occurs between hosts with no previous setup. The device at one end of the communication transmits data to the other, without first ensuring that the recipient is available and ready to receive the data. The device sending a message simply sends it addressed to the intended recipient. The Internet Protocol (IP) and User Datagram Protocol (UDP) are connectionless protocols, but TCP/IP (the most common use of IP) is connection-oriented
What is the form of the signal in twisted pair cable and coxial cable?
Twisted pair wiring is a digital signal.
Coaxial cable is an analog signal.
Why is TCP-IP the chosen network protocol?
TCP IP is the protocol of choice when it comes to networking due to its ability to confirm the receipt of packets by the intended destination. As such, this protocol in email and web browsing.
What does a port scanner tell an attacker?
Now if you mean how does it catch a attacker:
If a large amount of packets are being sent through ports that are above normal, or above the standards sent, it would assume its a attacker and posibly close the port until future action is stated.
If you mean how a attacker finds a port:
The attacker merely sends multiple small packets to multiple ports and sees which comes with a received message, stating it is a open port prone to attack.
