Networking Fundamentals

Question 1

OSI Layer 1

Answer 1

The physical layer

Question 2

OSI Layer 2

Answer 2

The data link layer

Question 3

OSI Layer 3

Answer 3

The network layer

Question 4

OSI Layer 4

Answer 4

The transport layer

Question 5

OSI Layer 5

Answer 5

The session layer

Question 6

OSI Layer 6

Answer 6

The presentation layer

Question 7

OSI Layer 7

Answer 7

The application layer

Question 8

This layer uses binary expressions to represent data

Answer 8

Layer 1: The physical layer

Question 9

Groups of binary bits grouped together is called

Answer 9

A Protocol Data Unit (PDU)

Question 10

The word ‘Packet’ is used in lieu of

Answer 10

Protocol Data Unit (PDU)

Question 11

This layer uses frames to represent data

Answer 11

Layer 2: The data link layer

Question 12

This layer uses packets to represent data

Answer 12

Layer 3: The network layer

Question 13

This layer uses segments to represent data

Answer 13

Layer 4: The transport layer

Question 14

The name of the approach that uses voltage on a copper wire or the presence/absence of light on a fiber-optic cable to render a 1 or a 0 is

Answer 14

Current State Modulation

Question 15

Bus, Ring and Star topologies are associate with which layer of the OSI model?

Answer 15

Layer 1: The physical layer

Question 16

This approach synchronizes the internal clocks of both the sender and the receiver to ensure that they agree on when bits begin and end. A common approach to make this synchronization happen is to use an external clock (for example, a clock given by a service provider). The sender and receiver then reference this external clock.

Answer 16

Synchronous

Question 17

With this approach, a sender states that it is about to
start transmitting by sending a start bit to the receiver. When the receiver sees this, it starts its own internal clock to measure the next bits. After
the sender transmits its data, it sends a stop bit to say that it has finished
its transmission

Answer 17

Asynchronous

Question 18

Divide the bandwidth available on a medium (for example, copper or fiber-optic cabling) into different channels.

Answer 18

Broadband

Question 19

Uses all the available frequencies on a medium to send data. i.e. Ethernet

Answer 19

Baseband

Question 20

Allows multiple communications sessions to share the same physical medium. i.e. Cable TV

Answer 20

Multiplexing strategy

Question 21

Supports different communication sessions on the same physical medium by causing the sessions to take turns as a time slot.

Answer 21

Time-division multiplexing (TDM)

Question 22

To make a more efficient use of available bandwidth, this protocol dynamically assigns time slots to communication sessions on an as-needed basis.

Answer 22

Statistical time-division multiplexing (StatTDM)

Question 23

Divides a medium’s frequency range into channels, and different communication sessions send their data over different channels. This approach to bandwidth usage is called broadband.

Answer 23

Frequency-division multiplexing (FDM)

Question 24

Packaging data into frames and transmitting those frames occurs on what OSI layer?

Answer 24

Layer 2: The data link layer

Question 25

Which OSI layer uniquely finds network devices with an address

Answer 25

Layer 2: The data link layer