Acronyms Flashcards
ARP
Address Resolution Protocol is used to map IP network addresses to the hardware addresses used by a data link protocol
MAC
Media Access Control is the physical address associated with a device
MTU
Maximum Transmission Unit is how big a frame can be.
CSMA /CD
Carrier Sensing Multiple Access / Collision Detection is used usually in a hub environment to help with multiple broadcast occuring at the same time. Not needed for switches.
CSMA /CA
Carrier Sensing Multiple Access / Collision Avoidance is used when multiple broadcasts are occuring within a hub like environment. Not needed for a switch environment.
STP
Spanning Tree Protocol prevents bridge loops and the broadcast radiation that results from them.
Broadcast
Traffic intended for all devices on a network.
Multicast
Traffic intended for a group of devices. (multicast group)
Unicast
Traffic intended for a single device. Ex: Printing to a printer
HUB
are devices with no intelligence or ip address. They replicated data to all devices connected within it. They aren’t used very much anymore since Switches and Routers can do much more.
Switch
a hardware device that filters and forwards network packets, but is often not capable of much more. Used at Layer 2.
Router
A device designed to receive, analyze and move incoming packets to another network. It may also be used to convert the packets to another network interface, drop them, and perform other actions relating to a network
VLAN
Virtual Local Area Network is a layer 2 boundary that determines how far a broadcast will go inside of a network infrastructure.
Access Ports
a type of connection on a switch that is used to connect a guest virtual machine that is VLAN unaware. This port provides the virtual machine with connectivity through a switch that is VLAN aware without requiring it to support VLAN tagging.
Trunk
a communications line or link designed to carry multiple signals simultaneously to provide network access between two points. Trunks typically connect switching centers in a communications system
802.1Q
a protocol that labels or tags a frame with a vlan so another switch can know what vlan the mac address is associated with.
BPDU
Bridge Protocol Data Unit is a data message transmitted across a local area network to detect loops in network topologies
Root Bridge
Is the top level of the spanning tree protocol.
Root Port
is the port the switch chooses for its overall best path to the root switch.
Switch Loop
occures when there is more than one Layer 2 (OSI model) path between two endpoints (e.g. multiple connections between two network switches or two ports on the same switch connected to each other).
Port Forwarding
a networking technique through which a gateway or similar device transmits all incoming communication/traffic of a specific port to the same port on any internal network node
IP Forwarding
The process uses routing information to make decisions and is designed to send a packet over multiple networks
POE
Power over Ethernet is a term used for providing dc power from a switch over an ethernet cable to a device. (Ex: Access Point)
DMZ
A Demilitarized zone is a physical or logical subnetwork that contains and exposes an organization’s external-facing services to an untrusted network, usually a larger network such as the Internet. It is neither internal or external itself.
