Chapter 6 Flashcards
what is TCP/IP?
174
Transmission Control Protocol/Internet Protocol.
DoD has 4 layers what are they?
175
process/Application layer.
Host-to-host layer.
Internet layer.
network layer.
Process/ Application layer.
175
process/ Application layer is the top most layer of four layer DoD model.
process/ Application layer defines TCP/IP application protocols and how host programs interface with Host to host layer services to use the network.
Host-to-host layer
175
Host-to-host layer is the third layer of the four layer DoD model, it defines the level of service and status of the connection used when transporting data.
Internet layer.
175
Internet layer is the second layer of the four layer DoD model, this layer tack care of the logical addressing of hosts by giving them an IP address, and it handle the routing of packets among multiple network.
network layer
175
Network Access Layer is the first layer of the four layer DoD model, this layer monitor the data exchange between the host and the Network.
The Process/ Application layer protocol.
176
Telnet, File Transfer Protocol, SFTP, TFTP, SMTP, POP, IMAP,
Telnet
176
Port 23. terminal emulation. it is not secure to use
File Transfer Protocol. FTP
176
Port 20/21. An Internet standard that allows users to upload and download files from other computers in the internet.
Secure File Transfer Protocol, SFTP
176
port 22. SFTP is a version of FTP that encrypts any commands and data transfers, helping keep your passwords secure and your session private. Because SFTP is a different protocol than FTP, for you to establish a SFTP connection, you must be connecting to a computer that supports SFTP. Using SFTP to connect to an FTP server will not work.
trivial file transfer protocol. TFTP
177
Port 69. Simplified version of FTP that allows files to be transferred from one computer to another over a network.
simple mail transfer protocol. SMTP
177
Port 25. de facto standard protocol used by email clients to send email to an email server.
post office protocol. POP
177
port 110. it give us a storage facility for incoming mail, and the latest version is called POP3
internet message access protocol IMAP, version 4
178
port 143.
Dynamic Host Configuration protocol/ bootstrap protocol, DHCP
port 67/68, assigns IP addresses to hosts with information provided by the server
a client send out 2 broadcast to both layer 2 and 3, in order to receive an IP address what are they?
183
layer 2 broadcast is all Fs in hex FF:FF:FF:FF:FF:FF
layer 3 broadcast is 255.255.255.255
which means all network and all hosts
The host to host layer has 2 protocols what are they?
184
The Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
The Transmission Control Protocol (TCP)
184
The Transmission Control Protocol (TCP) takes large blocks of information from an application and breaks them into segments. It numbers and sequences each segment so that the destination’s TCP protocol can put the segments back into the order the application intended. After these segments are sent, TCP (on the transmitting host) waits for an acknowledgment of the receiving end’s TCP virtual circuit session, retransmitting those that aren’t acknowledged.
TCP used a type of communication called what?
184
The type of communication is called connection-oriented. During this three way handshake, the two TCP layers also agree on the amount of information that’s going to be sent before the recipient’s TCP sends back an acknowledgment. With everything agreed upon in advance, the path is paved for reliable communication to take place.
User Datagram Protocol (UDP)
185
- Application developers can use the UDP.
- UDP is a thin protocol , it doesn’t take up a lot of bandwidth on a network.
Key features of TCP UDP
187
TCP UDP
Sequenced Unsequenced
Reliable Unreliable
Connection-oriented Connectionless
Virtual circuit Low overhead
Window flow control No windowing or flow control
The Internet Layer Protocols
189
There are two main reasons for the Internet layer’s existence: routing, and providing a single network interface to the upper layers.
4 protocol in the internet layer, what are they/
189
- Internet Protocol (IP)
- Internet Control Message Protocol (ICMP)
- Address Resolution Protocol (ARP)
- Reverse Address Resolution Protocol (RARP)
