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General Review A+ > Common Network Ports 2.1 - PM > Flashcards

Common Network Ports 2.1 - PM Flashcards

1
Q

What does your device need to know when it connects to a service running on a server?

A

the port number of the service

(where will traffic be directed to to reach that service)

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2
Q

What are well-known port numbers?

A

the standard/common port number our client uses that all services tend to use for that particular service

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3
Q

What does FTP stand for?

A

File Transfer Protocol

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4
Q

What are the port numbers for FTP?

A

tcp/20 (active mode data)
tcp/21 (control)

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5
Q

What does FTP do?

A

Transfers files between systems and list, add, delete files etc

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6
Q

What does SSH stand for?

A

Secure Shell

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7
Q

What is the port number for SSH?

A

tcp/22

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8
Q

In SSH, what is the “shell” referring to?

A

the text-based front end to the OS (window with command line looking text)

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9
Q

What does Telnet stand for?

A

Telecommunication Network

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10
Q

What is Telnet’s port number?

A

tcp/23

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11
Q

What is Telnet used for?

A

To log into (legacy) devices remotely and use its console (can operate the OS with text)

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12
Q

What does SMTP stand for?

A

Simple Mail Transfer Protocol

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13
Q

What is the port number for SMTP?

A

tcp/25

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14
Q

What is SMTP used for?

A

To send mail between mail servers, and also for clients to send email to a mail server

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15
Q

What does DNS stand for?

A

Domain Name System

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16
Q

What does DNS do?

A

converts a domain name to an IP address

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17
Q

What port number does DNS operate on?

A

udp/53

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18
Q

What does DHCP do?

A

automatically assigns IP addresses and other IP configuration (subnet mask, default gateway) settings to our local machines

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19
Q

What ports does DHCP operate on?

A

udp/67
udp/68

20
Q

What does DHCP require?

A

a DHCP server (he says DNS server in the video though)

-server
-appliance
-integrated into SOHO router
etc

21
Q

Where does DHCP get the IP addresses to assign to your devices?

A

It has a large pool of IP addresses available to hand out

22
Q

Are assigned IP addresses permanent?

A

No they’re leased for a certain time and can be renewed UNLESS using DHCP reservations for permanent IP addresses for a device

23
Q

What are HTTP and HTTPS used for?

A

for web browser communication with web servers

24
Q

What does HTTP stand for?

A

HyperText Transfer Protocol

25
Q

What ports do HTTP and HTTPS use?

A

HTTP tcp/80
HTTPS tcp/443

26
Q

What does POP3 and IMAP stand for?

A

POP3 - Post Office Protocol version 3
IMAP - Internet Message Access Protocol v4

27
Q

What is POP3 and IMAP used for?

A

to receive emails from an email server (authenticate, transfer)

28
Q

What ports does POP3 and IMAP use?

A

POP3 - tcp/110
IMAP - tcp/143

29
Q

What’s the difference between POP3 and IMAP?

A

POP3 doesn’t allow us to synchronize emails and changes across devices

30
Q

What does SMB stand for?

A

Server Message Block

31
Q

What is SMB used for?

A

file sharing, printer sharing

32
Q

What is SMB also called?

A

CIFS (Common Internet File System)

33
Q

SMB protocol is used by what OS?

A

Microsoft Windows

34
Q

What ports would NetBIOS name services lookup and session service (transfer) use?

A

name services udp/137
session services transfer tc/139

35
Q

What port does the current SMB NetBIOS-less protocol use?

(what is used today)

A

tcp/445

36
Q

What does SNMP stand for?

A

Simple Network Management Protocol

37
Q

What is SNMP used for?

A

Monitors infrastructure devices; sets up traps; queries devices to receive responses

38
Q

What ports does SNMP use for queries and traps?

A

queries - udp/161
traps - udp/162

39
Q

What version of SNMP is for older devices?

A

Version 1

40
Q

Which version of SNMP is encrypted and uses authentication?

A

Version 3

41
Q

What are SNMP traps?

A

when you configure devices to actively inform you of any problems or changes

42
Q

What is LDAP used for?

A

used to store and retrieve information in a org’s network directory

(like Active Directory)

43
Q

What port number does LDAP use?

A

tcp/389

44
Q

What is RDP used for?

A

to share a desktop or application from a remote location

45
Q

What port does RDP use?

A

tcp/3389

46
Q

What clients can use RDP?

A

clients using macOS, Android, Linux, etc can connect to a Windows comptuer

General Review A+ (9 decks)

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