App protocols Flashcards

(20 cards)

1
Q

___ does not support Application layer protos

A

BPFs

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2
Q

*dynamically assigns IP addresses to each device on a network;
automates the process of configuring devices on IP networks;
uses UDP
port 67 and 68

A

DHCP

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3
Q

8 bits long;
opcode for request=1
opcode for reply=2
**3 hardware type opcodes

A

1- ethernet
6- IEEE 802 networks
7- ARCNET (LAN tech)

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4
Q

Discover: where is the server?
Offer: 1, the server is port 68
Request: I need an IP
Ack: server assigns IP to client

A

DORA

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5
Q

associates IP addresses with names to provide us with an easier way of identifying where we want to go;
translates domain names into computer readable IP addresses

A

DNS

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6
Q

Like DHCP, DNS also uses UDP. However for ______ it uses TCP

A

zone transfers

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7
Q

DNS query response flag

A

1

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8
Q

**4 DNS opcodes

A

0- query
2- status server request
4- notify of zone change
5- update

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9
Q

DNS response code

A

0- no error
1- format error
2- server failure
3- name error

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10
Q

transfers info between networked devices;
communication between clients and servers are done by requests and response headers

A

HTTP

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11
Q

encrypted data transfer sent between a web browser and a website;
request and response headers

A

HTTPS

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12
Q

HTTPS header that makes it secure is HTTP Strict-Transport-Security, and it is what type of header?

A

response header

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13
Q

store and forwards email; uses MTA Mail Transfer Agent;
port 25
Headers are:
Date
From
Reply-To
To
Cc
Bcc

A

SMTP

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14
Q

*you get mail but you have to ask it if you have mail;
same headers except adds a _______, which contain the headers of the message, a blank line and the first 10 lines of the body of the message

A

POP3; TOP command

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15
Q

issued to download an email header in POP

A

TOP command

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16
Q

allows a client to access mail stored on a remote server;
commands sent by client & responses by server;
once client logs in state changes from “not authenticated” to “authenticated”;
you have mail

17
Q

IMAP state commands

A

1) Any state commands- can be entered anytime during connection
2) Not Authenticated State- commands can only be entered prior to log in
3) Authenticated State- can only be entered after logging into the server

18
Q

CHECK - Requests the server performs any housekeeping on the mailbox.
CLOSE - Permanently removes all the messages marked for deletion and returns server back to an authenticated state.
EXPUNGE - Permanently removes all the messages marked for deletion and remains in the mailbox.
SEARCH - Requests a search of the current mailbox for text specified.
FETCH - Retrieves the message specified from the current mailbox.
STORE - Changes information about a message such as its associated flags (e.g., deleted flag).
COPY - Copies specified message to the end of specified mailbox.
UID - Modifies the following commands to use UIDs instead of message numbers

A

IMAP selected state messages

19
Q

Commands that can manipulate messages in the current IMAP mailbox

A

selected state

20
Q

TLS & SSL use

A

HTTPS, port 443