Core 1 220-1101 Section 2

Question 1

TCP and UDP operate at which layer of the OSI model?

Answer 1

OSI Layer 4: Transport Layer

Question 2

Name the OSI model layer 1

Answer 2

Physical Layer

Question 3

Name the OSI model layer 2

Answer 3

Data Layer

Question 4

Name the OSI model layer 3

Answer 4

Network layer

Question 5

Name the OSI model layer 4

Answer 5

Transport layer

Question 6

Name the OSI model layer 5

Answer 6

Session layer

Question 7

Name the OSI model layer 6

Answer 7

Presentation layer

Question 8

Name the OSI model layer 7

Answer 8

Application layer

Question 9

TCP and UDP are transported inside of IP and said to be?

Answer 9

Encapsulated by the IP protocol

Question 10

TCP primary features?

Answer 10

Connection-oriented
Reliable delivery
Flow control

Question 11

What is meant by TCP’s “reliable” delivery feature?

Answer 11

Error recovery
Reorders data messages or retransmits

Question 12

UDP primary features?

Answer 12

Connectionless
Unreliable delivery
No flow control

Question 13

What scenario would UDP be useful?

Answer 13

Real-time communication
ie. live streaming or phone calls

Question 14

What are two protocols that use UDP as its transport mechanism?

Answer 14

DHCP (Dynamic Host Configuration Protocol)
TFTP (Trivial File Transfer Protocol)

Question 15

What is DHCP?

Answer 15

Dynamic Host Configuration Protocol
Automatically assigns IP addresses to devices.

Question 16

In a UDP transport that uses DHCP, which is responsible for verifying data was received?

Answer 16

DHCP