Chapter 6 BB Flashcards
What are the 4 layers of the DoD model and which layer(s) of the OSI model do they compare to? Pg 175
Process/Application Layer -> application, presentation, and session layers.
Host-to-Host layer -> Transport Layer.
Internet layer -> Network Layer.
Network Access -> Data link and physical layers.
What is Telnet, what is its default port number, and how does it work? Pg 176
It disguises the client machine to appear as a terminal directly attached to the local network. Thus telnet is a virtual terminal that can interact with the chosen remote host. Port 23
What is FTP and what are the default ports it runs on? Pg 176
File Transfer protocol allows for the transfer of files across an IP network, both machines must be using it. FTP is also a program that can be used to perform file tasks by hand. Ports 20 and 21
What is Secure File Transfer Protocol? Port #? Pg 176
Used to transfer files over an encrypted connection. Port 22
What is SMTP? Port #? Pg 177
Simple Mail Transfer Protocol sends a message(email) to a destination which is then put in a queue which is periodically checked by the server software at the destination which then delivers them to the end destination. This is used for sending email. Port 25
What is POP? Port #? Pg 177
Post Office Protocol provides a storage facility for incoming mail. When a client device connects to a POP3(the latest version) server messages addressed to that client are released. Port 110
What is IMAP, why is it favorable to POP3, and what is its port #? Pg 178
Allows you to view just a portion of the email before downloading the whole thing, which is a handy security feature in the case of emails containing malware. Supports Kerberos authentication scheme. IMAP4 is latest version and the default port is 143.
What is RDP? Port #? Pg 178
Remote Desktop Protocol allows you to connect to another computer remotely and run programs. Unlike Telnet it provides the actual GUI of the client you are connecting to. Port 3389
What is TLS/SSL? Port #? Pg 178
Transport Layer Security and its forerunner, Secure Sockets Layer, are cryptographic protocols that help enable secure online data-transfer activities like browsing the web, instant messaging, internet faxing, etc. These protocols are not bound to any certain ports and can use various different ones but use ports 995/465, respectively, for gmail.
What is SIP? Port #? Pg 178
Session Initiation Protocol is a signaling protocol used to construct/deconstruct comm sessions for many things like voice and video calls, videoconferencing, streaming multimedia distribution, instant messaging, presence information, and online games over the internet. Port 5060/5061
What is RTP? Port #? Pg 179
Real-Time Transport Protocol describes a packet-formatting standard for delivering audio and video over the internet that is commonly used in media streaming, videoconferencing, and push-to-talk systems. Port 5004/5005
What is MGCP? Port #? Pg 179
Media Gateway Control Protocol is a standard protocol for handling the signaling and session management needed during a multimedia conference. Can be used to set up, maintain, and terminate calls between multiple endpoints. Port 2427/2727
What is H.323? Port #? Pg 179
Provides a standard that defines how real-time audio, video, and data information is transmitted on an IP network. Provides signaling, multimedia, and bandwidth control mechanisms. Uses the RTP standard for communication and runs on port 1720.
What is SNMP? Port #? Pg 179
Simple Network Management Protocol collects and manipulates valuable network information. SNMP has “watchdogs” called agents that look for aberrations in the network, when an aberration occurs the agent sends an alert called a trap to the management station. SNMP receives a baseline which denotes what a healthy network should look like. SNMP can help simplify setting up a network and the administration of the network. Port 161.
What is SSH? Port #?
Secure Shell protocol sets up a secure Telnet session over a standard TCP/IP connection and is employed for logging into other systems, running programs on remote systems, and moving files from one system to another. All the while maintaining a strong encrypted connection. Port 22
