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Ports and Protocols 1101

Authored by willie reynolds

Professional Development

Professional Development

Used 6+ times

Ports and Protocols 1101
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10 questions

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1.

MATCH QUESTION

1 min • 1 pt

Match the protocol with its port number

TELNET

22

DNS

20, 21

FTP

25

SMTP

23

SSH

53

2.

MATCH QUESTION

1 min • 1 pt

Match the protocol with its port number

80

POP3

67, 68

HTTP

110

NETBIOS

137 - 139

DHCP

161, 162

SNMP

3.

MATCH QUESTION

1 min • 1 pt

Match the protocol with its port number

SLP

143

SMB

389

IMAP4

443

HTTPS

427

LDAP

445

4.

MATCH QUESTION

1 min • 1 pt

Match the protocol with its port number

3389

RDP

993

FTPS

69

TFTP

989

AFP

548

IMAPS

5.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

SMB port #

422

465

445

587

6.

DROPDOWN QUESTION

1 min • 1 pt

You are running a performance test using three different browsers on the same computer to simultaneously access the same web site. What numeric identifier or address is used to keep the three connections separate at the application (browser) level? (a)  

MAC Address
Port number
IP address
FQDN

Answer explanation

The port number is used to identify the application or service running on the host. It is used to create a socket which is the combination of the IP address and the port number such as 192.168.1.1:8000. The IP address identifies the host, and the port number identifies the application or service running on the host. Since the three browsers are running on the same system, the socket will have the same IP address, but each will have a different port number to help keep the three connections or conversations separate. The source port number is assigned randomly, but the destination port number for the service being requested, HTTP (web server), is 80 (443 for HTTPS).

7.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Jesenia read an article that said stored data, such as when you are downloading an app, is transmitted using TCP, but live-streaming events are transmitted using UDP. Why would this be true? Select two.

TCP is reliable and ensures the delivery of data using a connection-oriented mechanism.

UDP uses acknowledgements to ensure and guarantee the delivery of important data.

UDP will retransmit data that has been lost during the transmission to guarantee delivery.

UDP is fast and does not retransmit lost data so as not to disrupt the live video feed.

Stored data is transmitted to a specific device, but live-stream data is sent to various devices.

Answer explanation

TCP (Transmission Control Protocol) is reliable and uses a connection-oriented mechanism to guarantee the delivery of data. It expects an acknowledgement from the destination. If it does not receive one, it resends the data.

. Live stream video feeds and real-time calls using Voice over IP are best delivered in a continuous stream so as not to disrupt the experience. If a live-stream video packet is lost, the video quality may be degraded for a second. If a voice packet is lost, the recipient could ask to repeat the statement.

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