Explaining the TCP/IP Transport Layer and Application Layer Flashcards

1
Q

Which term is used to describe the application identifier for TCP and UDP applications?

A. port

B. IP address

C. MAC address

D. Organizationally Unique Identifier

A

A. port

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2
Q

Which protocol is used to carry voice streaming?

A. UDP

B. TCP

C. TCP and UDP

D. FTP

A

A. UDP

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3
Q

Which statement about TCP is correct?

A. TCP is a connectionless protocol in which a one-way datagram is sent to a destination without advance notification to the destination device.

B. TCP is connection-oriented and requires that network devices set up a connection to exchange data.

C. TCP does not provide error checking

D. TCP segments are not sequenced

A

B. TCP is connection-oriented and requires that network devices set up a connection to exchange data.

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4
Q

Which statement about UDP is correct?

A. UDP is a connectionless protocol in which a one-way datagram is sent to a destination without advance notification to the destination device.

B. A special feature of UDP recovers lost or corrupted packets.

C. Because of its high overhead, UDP is ideal for applications like HTTPS and SSH.

D. UDP is connection-oriented and requires that network devices set up a connection to exchange data.

A

A. UDP is a connectionless protocol in which a one-way datagram is sent to a destination without advance notification to the destination device.

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5
Q

Which protocol and port number are used by TFTP?

A. TCP/port 23

B. UDP/port 69

C. TCP/port 69

D. TCP/port 443

A

B. UDP/port 69

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6
Q

Which protocol and port number are used by HTTP?

A. TCP/port 8000

B. TCP/port 80

C. TCP/port 69

D. TCP/port 443

A

B. TCP/port 80

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7
Q

Which Microsoft Windows command is used to resolve a domain name into IP address?

A. nslookup

B. dns lookup

C. dns-lookup

D. dns-resolve

A

A. nslookup

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8
Q

Which two DHCP allocations result in the DHCP client always being associated with the same IPv4 address? (Choose two.)

A. DHCP dynamic allocation

B. DHCP automatic allocation

C. DHCP static allocation

D. DHCP unlimited allocation

E. DHCP uninterrupted allocation.

A

B. DHCP automatic allocation
C. DHCP static allocation

The correct answers are “DHCP automatic allocation” and “DHCP static allocation.” Automatic allocation of IP addresses is very similar to dynamic allocation, except that the lease time is set to never expire. This setting results in the DHCP client always being associated with the same IP address. Static allocation is an alternative that is generally used for devices that keep the same IP address configuration permanently. On the other hand, dynamic allocation does not always guarantee the same IP address to the DHCP clients, while there are no such allocation mechanisms as DHCP unlimited or uninterrupted allocations.

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9
Q

Which port number does HTTP use?

A. 80

B. 443

C. 43

D. 18

A

A. 80

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10
Q

Which Cisco IOS command displays the services that are running by viewing its open ports?

A. show control-plane host open-ports

B. show services open-ports

C. telnet open-ports

D. ping open-ports

A

A. show control-plane host open-ports

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11
Q

Which protocol and port number are used by SSH?

A. TCP/port 22

B. UDP/port 161

C. TCP/port 25

D. TCP/port 443

A

A. TCP/port 22

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12
Q

Which OSI stack layers match the Application layer of the TCP/IP stack?

A. application layer, presentation layer, and session layer

B. presentation layer, session layer, and transport layer

C. application layer, presentation layer, session layer, and transport layer

D. network layer and transport layer

A

A. application layer, presentation layer, and session layer

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13
Q

What is session multiplexing?

A. a process by which an IP host is able to support multiple sessions simultaneously and manage the individual traffic streams over a single link

B. a process by which an IP host is able to support multiple sessions simultaneously over multiple links

C. a process that is used for congestion avoidance

D. a process that is used for packet dropping

A

A. a process by which an IP host is able to support multiple sessions simultaneously and manage the individual traffic streams over a single link

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14
Q

What are the three main objectives of TCP reliability? (Choose three.)

A. detection and retransmission of dropped packets

B. detection and remediation of duplicate or out-of-order data

C. avoidance of congestion in the network

D. detection of dropped packets; the application does the retransmission

E. detection of duplicate or out-of-order data; the application does the remediation

F. avoidance of delay in the network

A

A. detection and retransmission of dropped packets
B. detection and remediation of duplicate or out-of-order data
C. avoidance of congestion in the network

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15
Q

Which three common applications use TCP? (Choose three.)

A. SNMP

B. web browsers

C. email

D. TFTP

E. FTP

F. VoIP

A

B. web browsers
C. email
E. FTP

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16
Q

Which Cisco IOS interface command specifies that the interface acquires an IPv4 address through DHCP?

A. ip address dhcp

B. dhcp address ip

C. ip helper-address

D. ip address request dhcp

A

A. ip address dhcp

17
Q

Which two characteristics describe HTTP? (Choose two.)

A. HTTP is a stateless protocol.

B. HTTP uses peer-to-peer model of communication.

C. HTTP is using only UDP protocol.

D. HTTP is a stateful protocol.

E. HTTP works on Application layer.

A

A. HTTP is a stateless protocol.

E. HTTP works on Application layer.

18
Q

What is a main characteristic of DNS?

A. converting human-readable names of IP end systems into machine-readable IP addresses

B. automatically assigning an IP address from an IP address pool that the administrator defines

C. automatically assigning a domain name from a domain name pool that the administrator defines

D. forwarding DHCP packets between clients and servers

A

A. converting human-readable names of IP end systems into machine-readable IP addresses

19
Q

Which three options are UDP benefits when compared to TCP? (Choose three.)

A. higher performance

B. lower-overhead data communications between hosts

C. higher-overhead data communications between hosts

D. lower-latency data transmission

E. higher-latency data transmission

A

A. higher performance
B. lower-overhead data communications between hosts
D. lower-latency data transmission

20
Q

What is a major difference between TCP and UDP?

A. TCP can ensure that the data is delivered, while UDP does not.

B. UDP can ensure that the data is delivered, while TCP does not.

C. TCP exists in the Transport layer of the TCP/IP model, while UDP exists in the Internet layer of the TCP/IP model.

D. TCP exists in the Internet layer of the TCP/IP model, while UDP exists in the Transport layer of the TCP/IP model.

A

A. TCP can ensure that the data is delivered, while UDP does not.

21
Q

Which three common applications use UDP? (Choose three.)

A. network printing

B. TFTP

C. database transactions

D. DNS

E. FTP

F. VoIP

A

B. TFTP
D. DNS
F. VoIP