Protocols Flashcards
What are the three different email protocols?
POP, IMAP and SMTP
What does POP stand for?
Post Office Protocol
What does IMAP stand for?
Internet Message Access protocol
What does SMTP stand for?
Simple Mail Transfer Protocol
When is SMTP used?
When an email is sent between servers (for example, when the sender and recipient have different service providers)
When is POP or IMAP used?
When accessing emails from a server
What are the two main differences between POP and IMAP?
POP:
1. Once downloaded, the email is deleted from the server
2. Emails are downloaded from the server and stored locally on the computer
IMAP:
1. All information is stored on the server, and isn’t deleted once a computer accesses it
2. Emails are kept on the server, even when accessed
When should POP be used? IMAP?
POP - when only one device is being used
IMAP - when multiple devices are being used
What is the main security benefit of POP? How is this also a negative?
When you download a message, it is deleted, and so a hacker is unable to access this email. However, if said hacker were to access the email before you, then you wouldn’t know you’d received the message, and wouldn’t be able to access the email itself.
What are the two protocols for viewing webpages? What do they stand for?
HTTP (HyperText Transfer Protocol) and HTTPS (HyperText Transfer Protocol Secure)
What makes HTTPS different from HTTP?
HTTPS makes use of encryption, whilst HTTP doesn’t
What is the TCP/IP protocol?
A combination of two protocols:
- Transfer Control Protocol (TCP)
- Internet Protocol (IP)
TCP is responsible for dividing and reassembling packets; IP locates the recipient’s device and routes the packets. It is the most fundamental protocol, which other protocols (such as SMTP) build upon to do specific tasks.
What protocol is used when transferring files between a client and a server?
File Transfer Protocol (FTP)
