Chapter 2 Test

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

PSH Flag

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

TCP/IP

What is the decimal equivalent of the binary number 11000001?

193

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

443

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

69

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

80

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

Application

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

ICMP

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

ISN

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?

ISN

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

Session Hijacking

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

TCP

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

Transport Layer

A protocol that does not need to verify whether the receiver is listening or ready to accept the packets

connectionless protocol

Attack that relies on guessing the ISNs of TCP packets

network session hijacking

A common language used so computers can communicate with one another

protocol

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

127 Address

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

25

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

53

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

Application

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

Internet

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

Network

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. True/False

True

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

True

Fast but unreliable delivery protocol that operates at the Transport layer

UDP

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

connection-oriented protocol

A logical component of a TCP connection that can be assigned to a process that requires network connectivity

port

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

port

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

254

What IPv4 address class has the IP address 221.1.2.3?

Class C

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

False

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

False

Protocol used to send messages related to network operations

ICMP

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

SYN Flag

Occupies one bit of the TCP segment and can be set to 0 (off) or 1 (on)

TCP flag

What does the acronym TCP represent?

Transmission Control Protocol

A TCP/IP process that is used to establish a connection before data is sent

three-way handshake

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?

Transport

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

UDP

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

False