Deck 2: Tcpip Concepts Review

Question 1

What layer protocols operate as the front end to the lower-layer protocols in the TCP/IP stack?

A) Internet
B) Network
C) Transport
D) Application

Answer 1

D

Question 2

What layer,in the TCP/IP stack,do applications and protocols,such as HTTP and Telnet,operate?

A) Internet
B) Network
C) Transport
D) Application

Answer 2

D

Question 3

What does the acronym TCP represent?

A) Transfer Control Protocol
B) Transmission Control Protocol
C) Transfer Congestion Protocol
D) The Control Protocol

Answer 3

B

Question 4

What layer,in the TCP/IP stack,is responsible for routing a packet to a destination address?

A) Internet
B) Network
C) Transport
D) Application

Question 5

No matter what medium connects computers on network-copper wires,fiber-optic cables,or a wireless setup; the same protocol must be running on all computers if communication is going to function correctly.

Question 6

What port does the Simple Mail Transfer Protocol,or SMTP service use?

A) 25
B) 53
C) 69
D) 80

Question 7

What port is typically reserved and utilized by the Secure Hypertext Transfer Protocol to create a secure connection to a Web server?

A) 443
B) 80
C) 434
D) 408

Question 8

In the TCP/IP stack,the Transport layer includes network services and client software.

Question 9

What protocol is the most widely used and allows all computers on a network to communicate and function correctly?

A) IPX/SPX
B) ATM
C) TCP/IP
D) NetBIOS

Question 10

What port does the Trivial File Transfer Protocol,or TFTP service use?

A) 25
B) 53
C) 69
D) 80

Question 11

What is the logical component of a TCP connection that can be assigned to a process that requires network connectivity?

A) ISN
B) IP
C) port
D) SYN

Question 12

In the TCP/IP stack,what layer is concerned with physically moving bits across the network's medium?

A) Internet
B) Network
C) Transport
D) Application

Question 13

What port does the Hypertext Transfer Protocol,or HTTP service use?

A) 25
B) 53
C) 69
D) 80

Question 14

An octal digit can be represented with only three bits because the largest digit in octal is seven.

Question 15

What type of network attack relies on guessing a TCP header's initial sequence number,or ISN?

A) ARP spoofing
B) Session hijacking
C) DoS
D) Man-in-the-middle

Question 16

A hex number is written with two characters,each representing a byte.

Question 17

To retrieve e-mail from a mail server,you most likely access port 119.

Question 18

In the TCP/IP stack,what layer is concerned with controlling the flow of data,sequencing packets for reassembly,and encapsulating the segment with a TCP or UDP header?

A) Internet
B) Network
C) Transport
D) Application

Question 19

What port does the Domain Name System,or DNS service use?

A) 25
B) 53
C) 69
D) 80

Question 20

What layer,in the TCP/IP protocol stack,is responsible for encapsulating data into segments?

A) Transport layer
B) Internet layer
C) Application layer
D) Network layer

Question 21

UDP is an unreliable data delivery protocol.Why is UDP widely used on the Internet?

Question 22

What TCP/IP protocol is used to send messages related to network operations and can be used to troubleshoot network connectivity?

A) ICMP
B) UDP
C) TCP
D) ARP

Question 23

What is the binary numbering system and why was it chosen by computer engineers to be used in computers?

Question 24

Why should a security professional fully understand the TCP header components?

Question 25

How many host computers can be assigned a valid IPv4 address when using a CIDR /24 prefix?

A) 254
B) 512
C) 65,000
D) 16 million

Question 26

How many host addresses can be assigned with a subnet mask of 255.255.255.0? Explain how you calculated the result.

Question 27

What is the Domain Name System (DNS)used for?

Question 28

What is the decimal equivalent of the binary number 11000001?

A) 128
B) 164
C) 193
D) 201

Question 29

What is ICMP used for?

Question 30

What TCP flag is responsible for synchronizing the beginning of a session?

A) URG flag
B) ACK flag
C) PSH flag
D) SYN flag

Question 31

Often technical personnel who are not familiar with security techniques think that restricting access to ports on a router or firewall can protect a network from attack.Why is this solution ?

Question 32

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
Protocol used to send messages related to network operations

Question 33

What are the critical components of a TCP header?

Question 34

What IP address is used as a loopback address and is not a valid IP address that can be assigned to a network?

A) 128 address
B) 127 address
C) 224 address
D) 255 address

Question 35

What TCP/IP protocol is fast,unreliable,and operates at the Transport layer?

A) TCP
B) UDP
C) FTP
D) POP3

Question 36

What is a Class B IP address?

Question 37

What TCP flag is responsible for delivering data directly and immediately to an application?

A) ACK flag
B) PSH flag
C) RST flag
D) SYN flag

Question 38

What connection-oriented protocol is utilized by the Transport layer?

A) HTTPS
B) UDP
C) TCP
D) SSL

Question 39

What 32-bit number tracks packets received by a node and allows the reassembling of large packets that have been broken up into smaller packets?

A) IP
B) TCP
C) UDP
D) ISN

Question 40

What IPv4 address class has the IP address 221.1.2.3?

A) Class A
B) Class B
C) Class C
D) Class D

Question 41

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
A 32-bit number that tracks packets received by a node and allows reassembling large packets that have been broken up into smaller packets

Question 42

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
A protocol that does not need to verify whether the receiver is listening or ready to accept the packets

Question 43

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
A TCP/IP process that is used to establish a connection before data is sent

Question 44

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
Attack that relies on guessing the ISNs of TCP packets

Question 45

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
Occupies one bit of the TCP segment and can be set to 0 (off)or 1 (on)

Question 46

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
A common language used so computers can communicate with one another

Question 47

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
A protocol where the sender doesn't send any data to the destination node until the destination node acknowledges that it's listening to the sender

Question 48

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
Fast but unreliable delivery protocol that operates at the Transport layer

Question 49

Match each item with a statement below.a.ICMP
b.network session hijacking
c.TCP flag
d.port
e.UDP
f.connection-oriented protocol
g.ISN
h.connectionless protocol
i.protocol
j.three-way handshake
A logical component of a TCP connection that can be assigned to a process that requires network connectivity