Miscellany And Definitions Flashcards
Handshaking
The term “handshaking” is used to describe the process of one computer establishing a connection with another computer or device. The handshake is often the steps of verifying the connection, the speed, or the authorization of the computer trying to connect to it.
Protocol
A set of rules governing the format of messages that are exchanged between computers.
CDP is a ___ layer protocol. It shows information about what devices?
Data link (layer 2). Directly connected Cisco devices.
CSMA/CD
Carrier Sense Multiple Access with Collision Detection -
Carrier Sense Multiple Access With Collision Detection (CSMA/CD) is a media access control method used most notably in local area networking using early Ethernet technology. It uses a carrier sensing scheme in which a transmitting data station detects other signals while transmitting a frame, and stops transmitting that frame, transmits a jam signal, and then waits for a random time interval before trying to resend the frame.
What are the two types of synchronization in the LLC sub layer of the Data Link layer?
Isochronous and asynchronous
What does MTU stand for and what is an MTU?
A “maximum transmission unit”:
The maximum transmission unit (MTU) of a communications protocol of a layer is the size (in bytes) of the largest protocol data unit that the layer can pass onwards.
If a PDU exceeds the MTU size it must be segmented and passed on in multiple pieces.
What is the equation for determining how many links will be needed for a full mesh topology?
of links required = n • (n - 1) / 2
where
n = number of sites/nodes
What are the three different types of user applications as regards the level of user interaction? Given example of each.
- Batch applications - Low level of or no user interaction at all. eg: large file transfers with FTP, TFTP (A branch of the store reporting it’s inventory overnight)
- Interactive applications - involve human-to-device interaction. Bandwidth is more important than it is for batch applications. eg: database update
- Real-time applications - involve human to human interaction. Eg: Voice over IP, video. bandwidth is crucial
What are the three common types of network topology? Describe each.
Bus topology - like a gauntlet, all devices connected to one link:
. . . .
——————-
. . .
Star topology - hub and spoke; aggregation device in the middle, hosts connected directly to it.
Mesh topology - interconnected devices with redundant links. In a full mass, every device is directly connected to every other device
Which CDP command gives the same output as the show CDP neighbors detail command?
show cdp entry *
Start the initial configuration:
Router1#setup
