Protocols

Question 1

FILE TRANSFER PROTOCOL

(FTP)

Answer 1

• file transfer from a server to a client using the client / server model
• passwords passed in the clear
• Port 20 (FTP Data)
• Port 21 (FTP Control)

Question 2

SECURE SHELL

(SSH)

Answer 2

• secure alternative to Telnet
• command execution protocol
• Public Key Infrastructure (PKI)
• Port 22

Question 3

DOMAIN NAME SYSTEM

(DNS)

Answer 3

• translates IP addresses into domain names
• Port 53

Question 4

SIMPLE MAIL TRANSFER PROTOCOL

(SMTP)

Answer 4

• send internet email
• Port 25

Question 5

TELNET

Answer 5

• remotely administers network devices
• remotely connect to a system such as a server or router
• Port 23

Question 6

HYPER TEXT TRANSFER PROTOCOL

(HTTP)

Answer 6

• transmits web page data
• main protocol that is used by web browsers
• delivers web pages to the browser
• Port 80
• TCP

Question 7

HYPER TEXT TRANSFER PROTOCOL SECURE

(HTTPS)

Answer 7

• HTTP with Secure Sockets Layer (SSL)
• port used for secure web traffic
• Port 443

Question 8

POST OFFICE PROTOCOL: VERSION 3

(POP3)

Answer 8

• used to retrieve mail from a server
• stores email on server until user connects, then pushes all data to local device
• Port 110

Question 9

INTERNET MESSAGE ACCESS PROTOCOL

(IMAP)

Answer 9

• Retrieves email from an email server
• email is stored on server
• Port 143

Question 10

TRANSMISSION CONTROL PROTOCOL (TCP)

Answer 10

• connection oriented protocol
• connection formed between devices, direct port to port
• all packets sent and received in order
• highly reliable
• used by HTTP, HTTPS, FTP, SMTP, Telnet

Question 11

USER DATAGRAM PROTOCOL (UDP)

Answer 11

• connectionless
• for applications that need fast, efficient transmission, such as games
• error recovery is not attempted
• no guarentee that the messages or packets sent would reach at all
• used for voice, video

Question 12

OPEN SHORTEST PATH FIRST (OSPF)

Answer 12

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• router protocol which uses cost to determine route
• ADNS uses OSPF