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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 do you understand by broadcast network?
When a packet arrives at the network layer on the sender's device, it is encapsulated into a frame whose destination MAC address is all fs (FF-FF-FF...). The switch connected to the sender's device recognizes the all fs MAC address as a broadcast message and hence forwards it to all its ports.
Identify the command used to display information on routing-table updates and route-cache updates?
route#debug ip routing
What are the main advantages and disadvantages of using a layered network architecture?
The following are the advantages of a layered architecture:
Layered architecture increases flexibility, maintainability, and scalability. In a Layered architecture we separate the user interface from the business logic, and the business logic from the data access logic. Separation of concerns among these logical layers and components is easily achieved with the help of layered architecture.
Multiple applications can reuse the components. For example if we want a windows user interface rather than a web browser interface, this can be done in an easy and fast way by just replacing the UI component. All the other components like business logic, data access and the database remains the same. Layered architecture allows to swap and reuse components at will.
Layered architecture enables teams to work on different parts of the application parallely with minimal dependencies on other teams.
Layered architecture enables develop loosely coupled systems.
Different components of the application can be independently deployed, maintained, and updated, on different time schedules.
Layered architecture also makes it possible to configure different levels of security to different components deployed on different boxes. sO Layered architecture, enables you to secure portions of the application behind the firewall and make other components accessible from the Internet.
Layered architecture also helps you to test the components independently of each other.
The following are the disadvantages of a layered architecture:
There might be a negative impact on the performance as we have the extra overhead of passing through layers instead of calling a component directly.
Development of user-intensive applications can sometime take longer if the layering prevents the use of user interface components that directly interact with the database.
The use of layers helps to control and encapsulate the complexity of large applications, but adds complexity to simple applications.
Changes to lower level interfaces tend to percolate to higher levels, especially if the relaxed layered approach is used.
What device separates collision domains?
Bridges, Switches and Routers will all separate collision domains.
Physical
How switch faster as compare to hub?
Most of the time, a switch will send information only to the destination, while a hub will send to all of its ports. That makes the hub inefficient - in a hub, only one computer can transmit at a time.
Most of the time, a switch will send information only to the destination, while a hub will send to all of its ports. That makes the hub inefficient - in a hub, only one computer can transmit at a time.
Most of the time, a switch will send information only to the destination, while a hub will send to all of its ports. That makes the hub inefficient - in a hub, only one computer can transmit at a time.
Most of the time, a switch will send information only to the destination, while a hub will send to all of its ports. That makes the hub inefficient - in a hub, only one computer can transmit at a time.
You get involved with groups or discussions that they are in. You keep up on current events and you communicate positive social ethics...
How can a bridge know whether to forward frames?
How can a bridge know whether to forward frames?
Answer:
The bridge builds a list of MAC addresses on either side of the bridge. Therefore, it knows which packets should be forwarded to the other side and which should not. In the example of a packet that uses a MAC address not in its table it can err on the side of caution by forwarding the packet.
What is the difference between workstation and domain?
In terms of the internet:
A domain is a specific 32-bit URL address on the internet usually shown as 4 numbers separated by dots (ex: 70.100.145.175) or as alphanumeric name
(ex: www.wikianswers.com).
A workstation is one computer within a domain.
How to send message on a peer to peer network?
1.rightclick on "my computer"
2.select "manage"
3.doubleclick on services&applications"
4.doubleclick on "services"
5.in that window find "MESSENGER"named one
6.if u find, doubleclick on it,the "properties"window will be open
7.on "general tab"set "startup"to "automatic"
8.and below u can see"start"button, click on it >>>ok
open "command prompt"
type "net send <ip of reciever> <your message>
press enter
Network packets travel through different waypoints from A to Z compared to packets traveling from Z to A.
Asymmetric Routing (ASR, also seen:"asymmetrical route") does typically happen in the Internet and does not have to be a problem. Instead, it may be a manually configured - or most likely - automatic optimization.
In trivial local area networks (LANs) ASR is not to be expected, especially if a LAN does not have more than one gateway.
In complex LANs though ASR is possible. It may work fine, especially if packets only travel through routers but not through firewalls.
Typically firewalls expect to see the whole communication of each (e.g. TCP) connection passing through them but due to ASR they might only see packets in one direction.
A firewall may then supress all such communication as a security feature, by e.g. disconnecting such TCP connections.
What is a network types of network and how network mission is critical in business?
network is connection of two or more computers .
three main types of network:
1.LAN(local area network) means-LAN are confined to a small area.Usually,this small area is within a single building,although it need not be confined to just a single office.
Sometimes LAN's spread through several buildings on the same site.
2.MAN (METROPOLITAN AREA NETWORK) means-A MAN is a computer network run by one (1) organisation that connects together several LAN's across a larger area such as a city.It is larger than a LAN
3.WAN (WIDE AREA NETWORK) means-A WAN is a computer network spread over a very large area,and uses satellite and other connection rather than cable
there are also 2 others
4. CAN (campus area network)
5. PAN (personal area network)
1.PEER-TO-PEER2.CLIENT/SERVERBUISNESS DATA & INFORMATION CAN BE SHARED BY DIFFRENT BUISNESS ORGANISATIONS SITUATED AT DIFFRENT LOCATION.
IDENTIFYING JOB OPENINGS AND ARRANGING MEETINGS WITH THE PEOPLE WHO WILL MAKE THE HIRING DECICIONS
Your connection is slow because with a hub all four of you are sharing the same bandwidth. So if your hub has 100Mbps of bandwidth then each of you will be getting 25Mbps (100/4). On the otherhand a switch allows each of you to have the same bandwidth. So if you have a 100Mbps switch, then each of you will get 100Mbps. Hope this helps,
The function of ARP (address resolution protocol) is to obtain the MAC address of a host, and then map that MAC address to the host's IP address.
This protocol is used to translate physical addresses to internet protocol (IP) addresses.
A physical address can be the MAC (Media Access Control) address of a network card inside of a computer.
The information about which hardware address is associated with which IP address is usually stored in a table on each computer, the so-called ARP table.
In essence, ARP is used so that machines on the same network can find each other. It facilitates data exchange between computers on the same network.
Is it true or false Ethernet is an found on many LANs?
True - Ethernet is the predominant protocol found in LANs today.
How does tftp overcome the limitation of using a connectionless transport layer protocol?
TFTP doesn't really overcome the connectionless transport - it doesn't have to because the idea here is transferring files with speed, not quality. It doesn't matter to the protocol is the information doesn't arrive, or arrive correctly, etc.
