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Common Ports Flashcards

(47 cards)

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1
Q

FTP

A

File Transfer Protocol
- tcp port 20 (active mode data)
- tcp port 21 (control)
Authenticates with a username and password

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1
Q

SSH

A

Secure Shell
- Port (TCP) 22
- text-based console communication

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2
Q

SFTP

A

Secure File Transfer Protocol
-Encrypted network communicaiton
- TCP port 22
- File management in secure mode compared to regular FTP

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3
Q

Telnet

A

TCP port 23
- not secure
- telecommunication network
- not really used anymore

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4
Q

SMTP

A

Simple Mail transfer protocol
- server to server email transfer
- tcp 25 SMTP using plaintext
- tcp 587 SMTP using TLS encryption

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5
Q

DNS

A

Port 53
- large transfers may use port 53

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6
Q

DHCP

A

Dynamic host Configuration protocol
- port 67/68
- Automated configuration of IP address/subnet/etc…
- needs a DHCP server to use

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7
Q

TFTP

A

Trivial File Transfer Protocol
- Port 69
- transfer a small amount of information very quickly
- very simple file transfers like a phone

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8
Q

HTTP

A

Port 80
Hypertext transfer protocol
web server communication

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9
Q

HTTPS

A

HTTP over TLS or SSL
port 443
secure web server communication

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10
Q

SSL

A

Secure socket Layer

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11
Q

TLS

A

Transport Layer Security (newer compared to SSL)

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12
Q

NTP

A

Network Time protocol
- UDP 123
- Synchronize clocks between devices

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13
Q

SNMP

A

Simple Network Management Protocol
- UDP 161
Gather statstics from network devices
Version 1- no encryption/in the clear
Version 2 - in the clear /bulk transfer
Version 3- authenticaiton/encryption/ message integrity

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14
Q

SNMP Trap

A

UDP 162
- Alerts/notifcations from the network device

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15
Q

LDAP

A

Lightweight directory access protocol
TCP 389
Stores and retrieve infomration in a network directory

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16
Q

LDAPS

A

Lightweight directory access protocol secure
A non-standard implemetnation of LDAP over SSL
TCP 636

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17
Q

SMB

A

Server message block
- Protocol used by microsft windows
- integrated into Windows itself
- File share publishing/file lock
- TCP 445

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18
Q

Syslog

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A

Standard message logging
UDP 514
- transfer log data

19
Q

SIEM

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A

Security information and event manager
- central log collector

20
Q

SQL

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A

Structured Query Lanugage
- Standard language across data base servers

21
Q

Microsoft SQL

22
Q

RDP

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A

Remote desktop protocol
- share a desktop from a remote location over TCP 3389

23
Q

SIP

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A

Session Initiation protocol
- Voice over IP signaling
TCP 5060 and 5061
// setups and manages Voice over IP (VoIP

24
ICMP
Internet Control Message Protocol - ICMP is its own protocol (not used for data transfer) - used for text messaging - ping command is used by ICMP
25
GRE
Generic Routing encapsulation - the tunnel between two endpoints - Two endpoints appear to be directly connected to each other - no built in encryption - need additional VPn protocols to traverse a public network
26
VPNs protocols
Encrypted Data tranvsering a public network
27
IPSec
Internet Protocol Security - Security for OSI layer 3 - Authentication and Encryption for every packet - AH - authentication header - ESP - encapsulation security payload
28
IKE
Internet key Exchange (IKE) - Both sides agree on encryption and decryption keys
29
SA
Security Association - Keys aggreement
30
Diffie-Hellman
Used to create a shared secret key - port 500
31
ISAKMP
Internet Security Association and Key Management Protocol
32
Phase 1 and phase 2 of internet key exchange
Phase 1 builds the key Phase 2 include the ESP encrypted tunnel
33
Transport mode
IP header -> IPsec Header -> data -> IPsec Trailers - Data is enclosed and encrypted by header/trailer - IP header is not encrypted
34
Tunnel Mode
New IP Header -> IPsecHeader -> IP Header -> Data -> IPSec - IP header and data encrypted
35
AH
Authentication Header - An AH header you can add the to modes to hash a packet New IP Header -> AH header -> IP header -> Data
36
ESP
Encapsulation Security Payload - Ecnrypts the packet New IP Header -> ESP Header-> IP Header -> Data -> ESP Trailer -> Integrity Check value
37
Name different ways to transfer data?
- WiFi - Ethernet - HDD
38
TCP
OSI Layer 4 - Transmission Control Panel - Connection oriented (formal connection setup and close) - Reliable delivery (recovery from errors, manages out of order messages) - TCP allows us to make sure the other people recieved our message/data
39
UDP
Layer 4 - User Data Gram Protocol - Connectionless system - no formal open close setup - Unrealiable delivery - we don't know if they got it
40
IPv4 Sockets
Server IP Address, protocol, server application port number Client IP address, protocol, client port number
41
Non-Ephemeral Ports
Permanent Port Numbers (typically servers like HTTP/FTP) 0 to 1023
42
Ephemeral Ports
Temporary Port numbers (Typically clients) 1024 - 65535
43
Unicast
One-to-one connection - send information between two systems/file transfers
44
Multicast
One to many of many - like a subscription or App or video game - used in IPv4 and IPv6
45
Anycast
One to one of many - used IPv4 and IPv6 - The traffic to one of many is one of many similar systems
46
Broadcast
one to all - send information to everyone at once - limited tothe broad cast domain

Network+ (3 decks)

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