Computer Networking

It is needed because you need to reverse the signals of a transmit line to a receive signal line. This is what network connectivity devices do, such as hubs, switches, etc. If you aren't using a connection device then the cable has to do that job.

with a fax machine. But now fax has been replaced by email.

An error-detection code by itself does not control errors, but it can be used to request repeated transmission of errored code words until they are received error-free. This technique is called ARQ. In terms of error performance, ARQ outperforms forward error correction (FEC) because code words always are delivered error-free (provided the error-detection code doesn't fail). However, this performance does not come free of charge - we pay for it with decreased throughput.

The chief advantage of ARQ is that error detection requires simpler decoding than error correction. ARQ also is adaptive because it only re-transmits information when errors occur. On the other hand, ARQ schemes require a feedback path that may not be available.

The Simple Mail Transfer Protocol is used to coordinate the storage and transfer of email between users on a network. Other internet protocols include HTTP and FTP.

Data Loss

Packet Loss

Network Stalls

Network failure

Network connection failure

Private Slot Caps

Slot Caps

Bandwidth separation/splitting

Bandwidth Loss

Throttling.

Passwords are transferred over ssh in hashed form, not plaintext. Assuming you have a strong password, it would be very difficult to figure it out based on it's hash.

2 light years!

The difference between a router and a modem is that a modem connects you to the internet and a router connects you to a network. If you have 3 computer one modem and a router all computers would be able to connect to the internet because they are on a network.

Its called read your Information Systems Management book and stop trying to cheat. When it comes time for the test you aren't going to be able to go to google.com and type in questions hoping to find the answers. The answer is either hub, packet, switching, data protocol, routing, NIC, TCP. You chose which one

... Router.

Data Transceiver

The usual reason to use private IP addresses is when you have to share a single public IP address (or a few public IP addresses) among a larger number of computers. Nowadays, this situation is quite common - it is no longer possible to assign a public IP (version 4) address to each and every computer; IP addresses are starting to get scarce. In the scenario mentioned above, private IP addresses according to RFC 1918 are used in combination with NAT (network address translation).

The usual reason to use private IP addresses is when you have to share a single public IP address (or a few public IP addresses) among a larger number of computers. Nowadays, this situation is quite common - it is no longer possible to assign a public IP (version 4) address to each and every computer; IP addresses are starting to get scarce. In the scenario mentioned above, private IP addresses according to RFC 1918 are used in combination with NAT (network address translation).

The usual reason to use private IP addresses is when you have to share a single public IP address (or a few public IP addresses) among a larger number of computers. Nowadays, this situation is quite common - it is no longer possible to assign a public IP (version 4) address to each and every computer; IP addresses are starting to get scarce. In the scenario mentioned above, private IP addresses according to RFC 1918 are used in combination with NAT (network address translation).

The usual reason to use private IP addresses is when you have to share a single public IP address (or a few public IP addresses) among a larger number of computers. Nowadays, this situation is quite common - it is no longer possible to assign a public IP (version 4) address to each and every computer; IP addresses are starting to get scarce. In the scenario mentioned above, private IP addresses according to RFC 1918 are used in combination with NAT (network address translation).

Network diagrams display the project work as linkages through the chronological flow of work from start to finish. Gantt charts visually display primarily the work breakdown and the associated durations.

Telnet does not encrypt anything; that is why it is too insecure to use as a network protocol.

There are multiple reasons for that. The router you are trying to connect to might have MAC-filtering running, or your firewall does not have appropriate destination port open. Or you have wrong drivers and so on.

All commands sent over Telnet are transmitted in plain text. An intruder on the network could potentially capture ethernet frames as they move across the media. The captured frames could reveal the network configuration including passwords.

SSH (Secure Shell) encrypts all data sent between the client and server.

see related link

No - a peer to peer network means that every device (even a standalone server) has the same authority in the network. Each device can choose to share resources with other devices in the network.

In such a network there really isn't a 'central host' computer, unless you put a file or print or database service on a server that the other devices might want access to.

Cisco Systems.

Yes, you can. It's what most of people do.

see link below for answer

denial of service

its good because we need it

No, physically they are different numbers. Logically, however, both port 80 and port 8080 listen for HTTP traffic, so logically they are the same.

Port 80 is the standard, production port for HTTP traffic. Port 8080 is a 'test' port for HTTP traffic.