Application Layer

Question 1

FTP

Answer 1

File Transfer Protocol (1971), two-way transfer, transfer and control channels, list and navigate directories, upload and download, move/rename/delete, not super secure

Question 2

SFTP

Answer 2

FTP + SSH (Secure Shell Protocol)

Question 3

FTPS

Answer 3

FTP + TLS (TLS is same tech as HTTPS)

Question 4

FTP clients

Answer 4

FileZilla

Question 5

SCP

Answer 5

Secure Copy Protocol, it’s secure, transfer files over SSH, can send or receive files, CANNOT list or delete, sorta outdated

Question 6

HTTP

Answer 6

around since 1989, almost entirely for downloading files, CRUD

Question 7

Tim Berners-Lee

Answer 7

inventor of HTML and HTTP

Question 8

HTTPS

Answer 8

HTTP + TLS (Transport Layer Security)

Question 9

HTTP servers

Answer 9

Apache, NGINX, Microsoft IIS

Question 10

File syncing

Answer 10

Dropbox, Google Drive, OneDrive, Box Sync, rsync

Question 11

HTTP/1.1

Answer 11

started in 1997, still widely used today, TCP port 80 (443 for HTTPS)

Question 12

URI

Answer 12

Uniform Resource Identifier (tells the server what piece of content to grab)

Question 13

HTTP request

Answer 13

method, URI, version

Question 14

HTTP response

Answer 14

request version, status code, content

Question 15

HTTP methods

Answer 15

GET, POST, DELETE

Question 16

Status codes

Answer 16

Indication of result of whatever happened (404)

Question 17

HTTP/2

Answer 17

mostly encrypted, compressed, servers can push content (single connection from browser to server)