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CompTIA A+ 1101 > Ports & Protocols > Flashcards

Ports & Protocols Flashcards

1
Q

tcp/20

A

FTP - File Transfer Protocol

Data

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2
Q

tcp/21

A

FTP - File Transfer Protocol

Transfer Control

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3
Q

tcp/22

A

SSH - secure shell

Connect to remote console of another device - Encrypted

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4
Q

tcp/23

A

TelNet - Telecomm Network Protocol

Connect to remote console of another device - Unencrypted

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5
Q

tcp/25

A

SMTP
Simple Mail Transfer Protocol

		Sending mail to server by Client
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6
Q

udp/53

A

DNS - Domain Name System

	Resolve an IP address from text-based Web address
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7
Q

Udp/67

A

DHCP - Dynamic Host Configuration Protocol

	Server (router/WAP) assigns IP addresses to network devices
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8
Q

udp/68

A

DHCP - Dynamic Host Configuration Protocol

	Server (router/WAP) assigns IP addresses to network devices
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9
Q

tcp/80

A

Http - Hypertext Transfer Protocol

Unencrypted

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10
Q

Tcp/443

A

Https - Hypertext Transfer Protocol Secure

	encrypted
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11
Q

tcp/110

A

POP3 - Post Office Protocol v3

	Retrieve email into a fixed mailbox (non-mirrored)
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12
Q

tcp/143

A

IMAP ‐ Internet Message Access Protocol v4

Retrieve email & Sync inbox across multiple clients

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13
Q

tcp/145

A

Direct SMB - Server Message Block (a.k.a. CIFS - Common Internet File System)
[Modern Windows] device-to-device

File + Printer sharing between computers

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14
Q

udp/137

A

$ nbname
SMB (NetBIOS) - Server Message Block
[older Windows]

Name service listing networked computers

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15
Q

tcp/139

A

$ nbsession
SMB (NetBIOS) - Server Message Block
[older Windows]

Create session + Share file or print data

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16
Q

udp/162

A

SNMP Traps - Simple Network Management Protocol

Receive status alerts from Infra devices when performance metrics exceeded

17
Q

udp/161

A

SNMP Queries - Simple Network Management Protocol

Set monitoring config on an Infrastructure device given certain metrics

v3 [current] - Secure
Message integrity, Auth, encryption

v2 & v1 - Unencrypted
Bulk transfers & structured data

18
Q

tcp/389

A

LDAP - Lightweight Directory Access Protocol

Query and add information on a shared directory on server

E.g. Microsoft [current]
Active Directory

19
Q

tcp/3389

A

Remote Desktop

Start a GUI session on an external host device running Windows
Either take full control of system or served application

Clients for accessing via 3rd party platform/OS

CompTIA A+ 1101 (10 decks)

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