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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 is the example of packet switching network?
IP, Ethernet, Frame Relay, ...
IP, Ethernet, Frame Relay, ...
IP, Ethernet, Frame Relay, ...
IP, Ethernet, Frame Relay, ...
What happen if the UTP cable length is longer than maximum length that can be exceed by the cable?
If you exceed the maximum distance of any cable, the resulting transmissions will be subject to attenuation. The longer the distance, the weaker the signal becomes, until it becomes weak enough to be considered noise, and no longer considered data.
What is a vertical cross connect?
In a building structure that has three floors plus the basement after saying that as this example:
- The Vertical Cross Connect is a Rectangle shaped connecting device to be able to wire cables from the MDF (Main Distribution Frame Vertically up a wall to all the other workstation that you are trying to interconnect with.
NOW AFTER SAYING THAT:
- while the cables are being vertically ran up the wall from the basement's Main Distribution Frame and in order to connect the workstation on each floor, each floor would have a connect to connect the wires coming from the Main Distribution Frame (MDF) which is called HCC (Horizontal Cross Connect) and it is a small square shaped connector which connects the wiring to all the workstations on each floor which is called Interconnecting.
A 'site' is an area of organization in Microsoft's Active Directory organization. It is used to keep links (such as WAN links) together. A site is a physical organization (as opposed to a logical organization such as an OU or domain) and is specified by a subnet.
In 7 layers of OSI MODEL which layer connection and termination occurs?
physical layer
Data Link Layer
Network Layer
Transport layer
session layer
Presentation layer
Application layer
Companies that have a class A IP address license?
A company with a class A address was either one of the very earliest adopters of the network technology or was part of the original network research. Of course, networks that required many clients would be part of that group as well.
Some universities have a class A, and companies such as IBM, and of course the government (which isn't really a company). Some ISPs may have a class A, as well as providers of backbone Internet technology, such as the DNS root level servers.
If a switch is connected to a router then the MAC address of the router is known to the switch through that port.
A host takes advantage of this by using the default gateway address (the address of the router) which the switch "knows" by its lookup table. Therefore, the switch can learn the address automatically and no configuration is necessary.
Most likely it's DDoS. There is nothing you can do about it.
Does the router do after it determines that a data packet from Network 1 should be forwarded to?
A router would then consult its tables to determine what the next router address should be, and the best route.
Discuss role of protocols at different layers of the OSI model?
Protocols at each of the OSI layers govern how they are to talk to each other. Each layer of the OSI model has different responsibilities and they may have multiple protocols that they could use.
The sender and receiver in networks must agree on a common ground for communication, which is the protocol. Depending on what you are trying to accomplish there are different protocols at different layers of the OSI model.
Basically, you need the two systems to agree on how to do that. That is the role of a protocol.
Found in peer-to-peer networks containing no servers?
A peer-to-peer network is not required for have a server at all. Therefore, any peer-to-peer network could be formed without a server.
In November of 1977, Robert. E. Khan demonstrated a crude TCP gateway between ARPANET (ancestor of the modern internet) and the Packet Radio network. TCP/IP emerged by the end of 1978, and replaced older, less flexible network protocols (ie- NCP, or Network Control Program) for ARPANET on January 1st, 1983.
However, there is no 'first IP address' in use today. The numbers are numerically insignificant, dynamic, and divided into ranges (or classes) reserved for specific uses (eg- public or private network addresses). This means that most addresses start in a range above anything that could be considered the 'first' IP address numerically, and unless statically assigned, can be changed and re-assigned arbitrarily.
Attempting to set your IP address (private OR public) to 0.0.0.1 would result in an error, and as far as I know, numbers starting in this range (with zero as the first octet) are rarely used in anything but special cases and unusual configurations (if at all). This means, conventionally, that no computer or networked device actually holds the (numerically) first IP address.
What Is Network Specific Routing?
Network Specific Routing is a technique in which there is only one entry for all the host connected to the network. Instead of having an entry for each and every hosted connected to the same physical network.
Which concept is related to defining protocols that control access to network resources?
Type your answer here... NAC
Answer Explanation: Network Access Control (NAC) is a concept that uses policies to enforce controls that dictate object access within a network. NAC applications can be configured to test a system in order to verify that it adheres to company policies, such as confirming that system patch levels and antivirus software are up to date. If the system does not adhere to the policies configured, it can prevent the system from accessing the network, or it can provide limited access until the system complies with the policies.
What is the difference between WAN and LAN?
The other difference between LAN and WAN, is the speed of the network. The maximum speed of a LAN can be 1000 megabits per second, while the speed of a WAN can go up to 150 megabits per second. This means the speed of a WAN, is one-tenth of the speed of a LAN. A WAN is usually slower because it has lower bandwidth.
Computers in a LAN can share a printer, if they are all in the same LAN. On the other hand, a WAN cannot share a printer, so a computer in one country cannot use a printer in another country. A LAN does not need a dedicated computer to direct traffic to and from the Internet, unlike a WAN that needs a special-purpose computer, whose only purpose is to send and receive data from the Internet.
Another LAN vs. WAN comparison is the cost of the network. A WAN is more expensive than a LAN. It is easier to expand a LAN than a WAN. The equipment needed for a LAN is a network interface card (NIC), a switch and a hub. On the other hand, the equipment needed to connect a WAN to the Internet is a modem and a router. The modem may be a cable modem or a DSL modem that is connected to a wall jack, while the router should be configured so that it can handle the packets traveling between the WAN and the Internet.
In LAN vs. WAN, there is a difference in the networking standard used. A LAN uses the Ethernet standard, while a WAN uses the T1 standard. Before Ethernet, the protocols used for LAN were Attached Resource Computer Network (ARCNET) and Token Ring. The protocols used for WAN are Frame Relay and Asynchronous Transfer Mode (ATM). Another protocol for WAN is Packet over SONET/SDH (PoS), where SONET stands for Synchronous Optical Networking and SDH stands for Synchronous Digital Hierarchy. The first WAN protocol was X.25, while an advanced WAN protocol is Multiprotocol Label Switching (MPLS). The hardware in a LAN is connected with 10Base-T cable connectors, while a WAN is connected via leased lines or satellites.
Here is an explanation of LANs and WANs. A LAN is easy to set up, as you need to slip the NIC into the PCI slot (for desktop computers) or PCMCIA slot (for laptop computers). You also need to install the driver for the NIC. The NIC can be connected to the network using the RJ45 port.
On the other hand, a WAN is very difficult to set up. There is often an appliance to optimize the WAN. There is also a device to cache WAN data, so workers in the branch office can quickly access documents. The router also has Quality of Service (QoS) built in, so that it gives priority to certain kinds of traffic.
There are various topologies available in LAN and WAN networking. The most common topologies in LAN and WAN networks are ring and star. The ring topology is a network in which every node (every computer) is connected to exactly two other nodes. The star topology is a network in which all the nodes (called leaf nodes or peripheral nodes) are connected to a central node.
What is the color layout for a a cross over cable?
Std. or straight-through Ethernet cable, by 568b specs, is Or/Wh, Or, Gr/Wh, Bl, Bl/Wh, Gr, Br/Wh,Br. Both ends.
Crossover is standard on one end, but Gr/Wh, Gr, Or/Wh, Bl, Bl/Wh, Or, Br/Wh, Br. You are crossing your transmit pair with your receive pair. Some sources would have you cross the other two pairs, as well, but it's not necessary.
Or = Orange, Wh = White, Bl = Blue, Gr = Green, Br = Brown.
Optical fiber cables transmit light from one end to the other. The data is encoded into this light beam and travels down the fiber in this light. Obviously you need optical sensors at each end to get the information in and out.
