Lesson 5 TCP IP Addressing

Question 1

TCP IP protocol suite defines what

Answer 1

how applications on separate nodes establish and track connections

Question 2

Why was TCP IP developed

Answer 2

To allow the addition of hardware and create a more flexible architecture

Question 3

TCP stack has how many layers

Answer 3

Four

Question 4

What are the TCP stack layers

Answer 4

Application
Transport
Internet
Network Access

Question 5

Compare the OSI model to the TCP model

Answer 5

d

Question 6

Which TCP layer adds a trailer during encapsulation

Answer 6

Network Access

Question 7

Which TCP layers add a header during encapsulation

Answer 7

Application
Transport
Internet

Question 8

Describe a connection-oriented protocol

Answer 8

The connection must be established before data is sent

TCP

Question 9

Describe a connection-less protocol

Answer 9

The connection does not need to be established before data is sent

UDP

Question 10

Connection-oriented protocols have how many stages

Answer 10

Three

1. Connection is established and parameters are negotiated
2. Devices transfer data
3. Connection is released and torn down

Question 11

Do connection-less protocols have stages for connections

Answer 11

No

Question 12

Can connection-oriented protocols work in uni direction or bir directional environments

Answer 12

Bi-direction only

Question 13

What are the two TCP/IP transport layer protocols

Answer 13

TCP and UDP

Question 14

Name a transport protocol

Answer 14

TCP and UDP

Question 15

TCP does what to a datagram

Answer 15

breaks them down into smaller segments

Reassembles them

Waits for acknowledgement of received data

Retransmits them if necessary

Question 16

Describe the three-way handshake

Answer 16

SYN

SYN-ACK

ACK

Question 17

What must happen before a client can establish an active connection

Answer 17

The server must perform an passive open then the client can perform an an active open

Question 18

SYN

Answer 18

Client sends a syn packet to the serve with a sequence number

Question 19

Are the three way handshake sequence numbers random

Answer 19

Yes – The number is random value A

Question 20

SYN-ACK

Answer 20

The server sends a syn-ack to the client with a sequence number with a value of A+1

Question 21

ACK

Answer 21

The client send a ack to the server with a sequence number of B+1

Question 22

Describe UDP

Answer 22

User Datagram Protocol

Connectionless Protocol

Best effort deliverary protocol

Smaller header than TCP therefore it means faster more effcient delivery

Question 23

What uses UDP

Answer 23

VOIP
Streaming real-time video
Network management applications

Question 24

When performance is more important than delivery which protocol should you use UDP or TCP

Answer 24

UDP

Question 25

IP works at which OSI layer

Answer 25

Layer 3

Question 26

Describe IP

Answer 26

It is a connection-less protocol Works as an intermediary between network and higher protocols

Question 27

IP makes no guarantee of

Answer 27

Packet delivery Corruption of data or lost packets

Question 28

IP works with TCP or UDP

Answer 28

True

Question 29

When TCP is used with IP, which one gurantees deliverary and the connection

Answer 29

TCP = deliverary IP = connection

Question 30

Describe ICMP

Answer 30

Used with IP to report the condition of connections between two nodes ICMP reports errors Connectionless Works at layer 3

Question 31

When a nodes buffler is being flooded, what happens

Answer 31

The node sends an ICMP source quench signal to the transmitting node

Question 32

ICMP Destination Unreacheable Means

Answer 32

Destination cannot be contacted

Question 33

ICMP Echo and Echo Reply are used when

Answer 33

Pinging a system

Question 34

Is ICMP traffic usually blocked on the network

Answer 34

Yes

Question 35

Name the IP protocols

Answer 35

``` UDP TCP IGMP ICMP ARP ```

Question 36

Describe IGMP

Answer 36

Supports multicasting OPerates at Layer 3 Provides one to many communications

Question 37

IGMP is best for what

Answer 37

Streaming videos or deploying images to multiple systems

Question 38

Describe ARP

Answer 38

Address Resolution Protocol Maps IP address to a physical or MAC address Works at Layer 2 of the OSI but encapsulated by an Ethernet header

Question 39

How does ARP work

Answer 39

It receives an address from IP If it knows the MAC address for that IP it will send it. If it doesn't know the MAC address, it will send out a broadcast to resolve the IP address. The node with that IP address will send a unicast transmission with its MAC address

Question 40

Protocol Analyzer are also called

Answer 40

Network analyzer

Question 41

Protocol analyzers can look at packets at which OSI layers

Answer 41

Physical Data Network Transport

Question 42

Can a protocol analyzer look at all channels on a wireless network at one time

Answer 42

NO

Question 43

Can a protocol analyzer look at the complete wired network at one time

Answer 43

Yes or it can look at certain segments

Question 44

What are some uses of protocol analyzers

Answer 44

Detecting network intrusions Analyzing network traffic patterns and potential problems Monitoring network usage and performance factors Filtering undesirable network traffic Launching an eavesdropping attack

Question 45

Protocol Analyzers can be software or hardware

Answer 45

Yes

Question 46

What do protocol analyzers need in order to capture all packets

Answer 46

Analyzers must have a network adapter Analyzers must be placed in promiscuous mode

Question 47

How can you decrease the number of ACKs on a TCP/IP network

Answer 47

Increase the PDU size

Question 48

Administrators must configure what on a TCP/IP network

Answer 48

Default Gateway Subnet mask IP address

Question 49

IP V4 address have how many bits

Answer 49

32

Question 50

IPV6 addresses have how many bits

Answer 50

128

Question 51

IP addresses are shown as

Answer 51

Dotted Decimals

Question 52

What is a subnet mask

Answer 52

A number assigned to each host for dividing the IP address into network and node potions

Question 53

First Octet from 1-127 has a default Subnet Mask of

Answer 53

255.0.0.0

Question 54

First Octet from 128 -191 has a default Subnet Mask of

Answer 54

255.255.0.0

Question 55

First Octet from 192-223 has a default Subnet Mask of

Answer 55

255.255.255.0

Question 56

Are these subnet masks permitted 255. 0.0.0 255. 255.0.0 255. 255.255.0 255. 255.128.0 255. 255.255.244

Answer 56

Yes

Question 57

Are these subnet masks permitted 255. 0.255.0 255. 255.292.255 255. 240.254.0 255. 255.0.192

Answer 57

No