Ccna David Bombal

It amplifies the signal, dont understand it. It recceives the signal and retransmit it so it cancover longer distances.

Layer 1 devices, they are dumb and dont understand what they receive, they just repeat. No intelligence here.

Is the same as a bridge, but these can learn mac addresses more quickly by using hardware. It allow us to connect many devices in a local area network, is not used for WAN. Layer 2 because they use etherner frames. Intelligence based on Mac Addresses.

They use IP addresses to route from one network to another. They are called layer 3 devices and are used to connect to WAN. Intelligence based on IP addreses.

Refers to the reduction in the strenght or intensity of a signal.

It is essentially a repeater with multiple rj45 ports. For example: a hub is a multiport repeater.

Is an intermidiate device between a switch and a hub. they learned where devices were in the network by using software.

They allow us to stop bad people getting in to our network.

Wireless LAN Controllers are used in Enterprise networks in order to centrally manage Wireless Access Points

Intrusion Detection System. Is like a dog it will warn you when there is an attacker or intruder. It does not stop the attacker it warns you that there is an attacker and then you can do something. They are not in the flow of traffic, they just get copies of the traffic to see if there is a problem.

Intrusion Prevention System, can alert you that there is a problem but also block the attack. The traffic goes through the IPS and when there is an attacker it blocks it.

Request for Comments. Is a way in wich people discuss protocols and agree in what a protocol should be used.

Is a way to communicate. The protocols define rules to communicate.

Data at layer 1. When data is sent at the physical layer. We are sending zeros and ones across the physical layer.In fiber optic a 1 will be represented by light and on copper it will be represented by electricity.

Internet Protocol. Is a number that you allocate to a device, that allows it to comunicate using a protocol.

Is an encrypted version of HTTP

Data at layer 2. When we are sending data through an Ethernet switch, which is a so called layer device, we are sending frames.

Data at layer 3. A router will route packets from one interface to another.

Data at layer 4.

Data from layer 5 to 7

It helps the upper layer to understand what protoocol will be used, for example ip version 4 or ip version 6.

This where a server service will listen

This what you will use when you initiate session to a well known port number

Used by FTP (File Transfer Protocol)

Used by HTTP (Hypertext Transfer Protocol)

Used by TFTP (Trivial File Transfer Protocol)

Used by Telnet

Used by SSH (Secure Shell)

Used by HTTPS

A way of representing information using only two options.

is a command line tool that will show me my IP address when using windows.

Internet Protocol version 4. 1. Layer 3 or network layer protocol. 2. connectionless protocol. In other words there are no sessions formed when traffic is transformed. 3- Packets treated independently 4-May take different paths. 5-Best effort of packet delivery. 6- no data recovery features 7- no built in session 8- no retransmission