Application Layer Flashcards
1
Q
SMTP
A
Mail sending protocol which transfers a message from a senders mail servers to a recipients mail servers
2
Q
Is SMTP a push or pull protocol?
A
Push protocol
3
Q
What restriction does SMTP have and why?
A
It restricts the body of a message to 7 bit ascii because it is a legacy technology, and the hardware available when it was made could only support this format
4
Q
HTTP
A
Hypertext Transfer protocol which is the webs application layer protocol
5
Q
What network protocol does HTTP use
A
TCP
6
Q
What does URL stand for?
A
Uniform Resource Locator
7
Q
What is a DNS record?
A
RR record which has a format type of (name,value,type,ttl)
8
Q
What are the types of a RR (resource record)?
A
A
- name is the host name
- value is the IP address
CNAME
- name is an alias for some canonical name
- value is the canonical name
NS
- name is the domain
- value is the host name of the authoritative name server
MX
- value is the name of the mail server associated with name
