002 - Data Communication

Question 1

What layer encapsulate Application data?

Answer 1

Layer 5,6 and 7
Application

Question 2

What layer encapsulate/decapsulate
TCP header | Application Data ?

Answer 2

Layer 4
Transport

Question 3

What layer encapsulate/decapsulate
IP Header | TCP Header | Application Data ?

Answer 3

Layer 3
Network

Question 4

What Layer encapsulate/decapsulate
Frame header | IP Header | TCP Header | Application Data ?

Answer 4

Layer 2
Data Link

Question 5

What layer encapsulate/decapsulate
IP Header | TCP Header | Application Data ?

Answer 5

Layer 3
Network

Question 6

Includes a set of bits in TCP Header

Answer 6

TCP Flags

Question 7

is the basic unit of exchange between entities that communicate using a specified networking protocol.

Answer 7

PDU
(Protocol Data Units)

Question 8

The TCP Flags that push the data to the application without buffering.

Answer 8

PSH

Question 9

The TCP Flags that sychronize sequence numbers.

Answer 9

SYN

Question 10

The TCP Flags that reset the connection.

Answer 10

RST

Question 11

The TCP Flags that is the last packet from the sender

Answer 11

FIN

Question 12

is a measurement representing the largest data packet that a network-connected device will accept.

Answer 12

MTU
(Maximum Transmission Unit)

Question 13

Fragments are always in multiples of 8 because of the number of fragmentation offset bits in the IP header

Answer 13

IP fragmentation

Question 14

How many bytes is the maximum of MTU that can be transmitted in the physical link.

Answer 14

“1472 bytes”
Standard size 1500 bytes - 8 bytes ICMP header - 20 bytes IP address = 1472 bytes