Chapter 1: The TCP/IP and OSI Models

Question 1

Examples of TCP/ IP transport layer protocols.

Answer 1

TCP and UDP

Question 2

TCP/ IP data link layer protocols.

Answer 2

Ethernet and PPP.

Question 3

An HTTP request to TCP for information is what type of interaction?

Answer 3

Adjacent-layer interaction.

Question 4

TCP segment marking, transmission and subsequent TCP acknowledgement is what interaction?

Answer 4

Same-layer interaction.

Question 5

A web server adding to a web page a TCP header, IP header and then data link header & trailer, is an example of what process?

Answer 5

Data encapsulation.

Question 6

Encapsulating data inside data link layer headers and trailers produces what entity?

Answer 6

A frame.

Question 7

Which OSI layer defines the functions of logical network-wide addressing and routing?

Answer 7

The Network Layer 3.

Question 8

Which OSI layer defines the standards for cabling and connectors?

Answer 8

The Physical Layer 1.

Question 9

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.

Answer 9

A packet.

Question 10

A generic reference to network services, typically WAN services, in which the service examines the contents of the transmitted data to make some type of forwarding decision.

Answer 10

Packet switching.

Question 11

A generic term referring to the header defined by some layer of a networking model, and the data encapsulated by the header (and possibly trailer) of that layer, but specifically not including any lower-layer headers and trailers.

Answer 11

A PDU Protocol Data Unit.

Question 12

In TCP, a term used to describe a TCP header and its encapsulated data.

Answer 12

A segment.

Question 13

OSI Layer 1: Name, PDU

Answer 13

Physical, Bits

Question 14

OSI Layer 2: Name, PDU

Answer 14

Data Link, Frames

Question 15

OSI Layer 3: Name, PDU

Answer 15

Network, Packets

Question 16

OSI Layer 4: Name, PDU

Answer 16

Transport, Segments

Question 17

OSI Layer 5: Name, PDU

Answer 17

Session, Data

Question 18

OSI Layer 6: Name, PDU

Answer 18

Presentation, Data

Question 19

OSI Layer 7: Name, PDU

Answer 19

Application, Data

Question 20

Which OSI Layer provides a user interface?

Answer 20

The Application layer

Question 21

Which OSI Layer handles processing such as encryption?

Answer 21

The Presentation layer

Question 22

Which OSI Layer keeps different applications’ data separate?

Answer 22

The Session layer

Question 23

Which OSI Layer provides error correction before re-transmit?

Answer 23

The Transport layer

Question 24

Which OSI Layer performs error detection but not correction?

Answer 24

The Data-Link layer

Question 25

Which OSI Layer provides reliable or unreliable delivery?

Answer 25

The Transport layer

Question 26

Which OSI Layer combines packets into bytes and bytes into frames?

Answer 26

The Data-Link layer

Question 27

Which OSI Layer provides logical addressing, which routers use for path determination?

Answer 27

The Network layer

Question 28

Which OSI Layer provides access to media using MAC addresses?

Answer 28

The Data-Link layer

Question 29

Which OSI Layer specifies voltage, wire speed and pinout of cables?

Answer 29

The Physical layer