Network +: 1.1 Protocols and Ports

Question 1

SSH

Answer 1

22

Question 2

DNS

Answer 2

53

Question 3

SMTP

Answer 3

25

Question 4

SFTP

Answer 4

22

Question 5

FTP

Answer 5

20,21

Question 6

TFTP

Answer 6

69

Question 7

TELNET

Answer 7

23

Question 8

DHCP

Answer 8

67,68

Question 9

HTTP

Answer 9

80

Question 10

HTTPS

Answer 10

443

Question 11

SNMP

Answer 11

161

Question 12

RDP

Answer 12

3389

Question 13

NTP

Answer 13

123

Question 14

SIP

Answer 14

5060, 5061

Question 15

SMB

Answer 15

445

Question 16

POP

Answer 16

110

Question 17

IMAP

Answer 17

143

Question 18

LDAP

Answer 18

389

Question 19

LDAPS

Answer 19

636

Question 20

H.323

Answer 20

1720

Question 21

Secure Shell

Answer 21

cryptographic protocol that is used remotely administer Linux server and network equipment through a text console. Securely log in without risk of password transmission in clear text. Incoming requests on TCP port 22. Common practice for cloud providers to use SSH for authentication of admins.

Question 22

Domain Name Services

Answer 22

A distributed directory of domain resource records. Used in translating fully qualified domain names to IP addresses. Also used other lookups such as IP addresses to FQDNs for locating services such as Lightweight Directory Access Protocol servers. Operate on UDP port 53 for simple lookups and TCP port 53, or zone transfer, for data replication

Question 23

Simple Mail Transport Protocol

Answer 23

Used by mail transfer agents to deliver emails to a destination email server. Process delivering the email to the email server. Other protocols such as Internet Message Access Protocol and Post Office Protocol on the email server are responsible for client access. Operates on TCP port 25

Question 24

Secure File Transfer Protocol

Answer 24

A file transfer protocol that uses the SSH inner workings. When SSH is installed on a system like Linux, SFTP is automatically enabled to transfer files. Command used is “scp”, which stands for Secure Copy Protocol. Awaits an incoming connection on TCP port 22

Question 25

File Transfer Protocol

Answer 25

Legacy file-sharing protocol that is still commonly used on the Internet. SFTP replacing FTP because encryption. Consists of control channel and data channel. Operates in active and passive modes.