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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

Can 2 email addresses have the same ip address?

Absolutely. Email addresses do not require IP addresses themselves in order to function. You can both have several PCs logged into the same email account, and have one PC logged in to several email accounts all at the same time.

Types of cables and which one is used where?

Mainly in LAN we can use 4 types of cables: 1) STP - Shielded Twisted Pair 2) UTP- Unshielded Twisted Pair UTP have 2 types 1 is Straight Cable 2 is Cross Cable 3) Coaxial Cable 4) Fiber Optic Cable

A 3000-km-long T1 trunk is used to transmit 64-byte frames using Go-Back-N protocol. If the propagation speed is 6 microsecondkm how many bits should the sequence numbers be?

Propagation time = 6 usec/km × 3000 km = 18 ms

Speed(T1) = 1.536 Mbps

Transmission time for a frame = 64byte × 8 / 1.536Mbps

= 0.3 ms

Total transmission time for a frame and its ack

= 2 × propagation time + transmission time for a frame

= 2 × 18ms + 0.3ms = 36.3ms

Window size = 36.3ms / 0.3ms = 121

As 27 = 128 > 121, so the sequence numbers should be 7 bits.

What does a network adapter look like?

A network adapter looks like a small circuit board with a series of copper connectors along one side. It also has a large RJ-45 connector at the back.

What is server rollback?

When a server is restored from a backup, usually due to a fault or error occurring on the system.

What ip address class is the ip address 0.0.10.0 in?

0.0.10.0 is a Class A address. You can justify by the below given information: Class A 0-127 | N | H | H | H | Class B 128-191 | N | N | H | H | Class C 192-223 | N | N | N | H | Class D 224-239 Reserved for multicasting Class E 240-255 Reserved for future use N- Network bits H- Host bits

Why FTP does not have a message format?

Because FTP uses TCP, which allows data to be streamed a byte at a time.

I registered to help you!

Regards,

Nayef

Which kind of cabling does FDDI use?

That is fiber optic cable, as FDDI stands for Fiber Distributed Data Interface

What is the effect of issuing the hostname RouterA command on a router?

A description will be configured on the router interfaces identifying them as belonging to RouterA.The router will attempt to establish a connection to the host with the name RouterA.The router will map an IP address to the domain name RouterA.The router prompt will change from Router(config)# to RouterA(config)#

You want to look for open ports on a network host to assess vulnerabilities?

There are several tools for this process. It depends on whether you want to probe from the inside of the network or from the outside of the network.

See the related link for Steve Gibson's ShieldsUp! site that will probe your system from the outside to see what is open and possibly vulnerable.

What is an Ethernet controller?

ethernet controller is the device which deals with lan card means local area connection

1 What devices are used in an ATM network?

An ATM network is made up of an ATM switch and ATM endpoints. An ATM switch is responsible for cell transit through an ATM network. The job of an ATM switch is well defined: it accepts the incoming cell from an ATM endpoint or another ATM switch. It then reads and updates the cell-header information and quickly switches the cell to an output interface toward its destination. An ATM endpoint (or end system) contains an ATM network interface adapter. Examples of ATM endpoints are workstations, routers, digital service units (DSUs), LAN switches, and video coder-decoders (CODECs). Figure 20-3 illustrates an ATM network made up of ATM switches and ATM endpoints. from Muhammad Faraz Ahmed

faraz_vu@hotmai.com

How many hosts and subnets are possible if you have an IP of 151.242.16.49 with a subnet mask of 7 bits?

151.242.16.49 would be class B in a classful environment with a network

mask of 16 bits. An additional 7 bit subnet mask puts the total mask at

23 (i.e.: 255.255.254).

Subnet ID would be: 151.242.16.0

Host address range: 151.242.16.1 through 151.242.17.254

Subnet Broadcast address would be: 151.242.17.255

How are VLANs and subnets related?

Although VLANs and subnets are quite different concepts, when using VLANs, there should be a one-to-one correspondence between the two. That is, every VLAN should be in a different subnet.

Although VLANs and subnets are quite different concepts, when using VLANs, there should be a one-to-one correspondence between the two. That is, every VLAN should be in a different subnet.

Although VLANs and subnets are quite different concepts, when using VLANs, there should be a one-to-one correspondence between the two. That is, every VLAN should be in a different subnet.

Although VLANs and subnets are quite different concepts, when using VLANs, there should be a one-to-one correspondence between the two. That is, every VLAN should be in a different subnet.