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22 Cards in this Set

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define:network
Network - A network is a group of computers connected together in a way that allows information to be exchanged between the computers
define:node
A node is anything that is connected to the network. While a node is typically a computer, it can also be something like a printer or CD-ROM tower
define:segment
A segment is any portion of a network that is separated, by a switch, bridge or router, from other parts of the network
define:backbone
The backbone is the main cabling of a network that all of the segments connect to. Typically, the backbone is capable of carrying more information than the individual segments. For example, each segment may have a transfer rate of 10 Mbps (megabits per second), while the backbone may operate at 100 Mbps.
define:topology
Topology is the way that each node is physically connected to the network (more on this in the next section).
define:lan
A LAN is a network of computers that are in the same general physical location, usually within a building or a campus. If the computers are far apart (such as across town or in different cities), then a Wide Area Network (WAN) is typically used
define:nic
Every computer (and most other devices) is connected to a network through an NIC. In most desktop computers, this is an Ethernet card (normally 10 or 100 Mbps) that is plugged into a slot on the computer's motherboard
define:mac
This is the physical address of any device -- such as the NIC in a computer -- on the network. The MAC address, which is made up of two equal parts, is 6 bytes long. The first 3 bytes identify the company that made the NIC. The second 3 bytes are the serial number of the NIC itself.
define:unicast
A unicast is a transmission from one node addressed specifically to another node
define:multicast
In a multicast, a node sends a packet addressed to a special group address. Devices that are interested in this group register to receive packets addressed to the group. An example might be a Cisco router sending out an update to all of the other Cisco routers.
define:broadcast
In a broadcast, a node sends out a packet that is intended for transmission to all other nodes on the network.
list 4 of the most commonly used networking topologies in use today.
bus,ring,star,star bus
fill in the blanks: In a _____ _____ ______, switches replace all the hubs of an Ethernet network with a dedicated segment for every node.
fully switched network
List the 3 methods by which a lan switch can forward packets.
store and forward,fragment free, cut-through
True or False:A hub or a switch will pass along any broadcast packets they receive to all the other segments in the broadcast domain, but a router will not.
true
define:transparent bridging
Allows the switch to learn everything it needs to know about the location of nodes on the network without the network admin having to do anything.
What are the five parts of transparent bridging
learning,flooding,filtering,forwarding, aging.
Describe the "learning process" for a switch.
After a switch has been added to a network, it receives its first frame, reads the source mac address and stores this in the segments lookup table
what is "flooding" in terms of transparent bridging.
When a switch does not know what segment a node is on it floods the frame to all ports except the one it came in on
what is "fowarding" in terms of transparent bridge.
when a switch knows which segment a node is on, it forwards the frame directly to that port.
describe "filtering" in terms of transparent bridging
The switch can determine if two communicating nodes on the same segent it wont need to do anything
describe the technique "aging" in terms of transparent bridging
The switch will time stamp entries in the lookup table. If there is no activity from a node after a certain amount of time the entry is removed.