CCNA 200-301 PRACTICE QUESTIONS WITH THE BEST
SCORES.
1) Same-layer interaction on different computers -- Answer ✔✔ The two computers
use a protocol to communicate with the same layer on another computer. The
Protocol defines a header that communicates what each computer wants to do
2) de-encapsulation -- Answer ✔✔ The process in which the device interprets the
lower-layer headers and, when finished with each header, removes the header,
revealing the next-higher-layer PDU.
3) Encapsulation -- Answer ✔✔ The placement of data from a higher-layer protocol
behind the header (and in some cases, between a header and trailer) of the next-
lower-layer protocol. For example, an IP packet could be encapsulated in an
Ethernet header and trailer before being sent over an Ethernet.
4) Frame -- Answer ✔✔ A term referring to a data link header and trailer, plus the
data encapsulated between the header and trailer.
5) Networking Model -- Answer ✔✔ A generic term referring to any set of protocols
and standards collected into a comprehensive grouping that, when followed by the
devices in a network, allows all the devices to communicate. Examples include
TCP/IP and OSI.
6) Packet -- Answer ✔✔ A logical grouping of bytes that includes the network layer
header and encapsulated data, but specifically does not include any headers and
trailers below the network layer.
7) PDU -- Answer ✔✔ A generic term from OSI that refers to the data, headers, and
trailers about which a particular networking layer is concerned.
