OSI Know This
TCP/IP has 5 layers. How many layers does OSI have?
7 Layers
SMTP - What does this acronym stand for?
Simple Mail Transfer Protocol
Sequence 200,001 - bits 41-60 are lost during a transmission. If pieces of a transmission are lost then error recovery can help recover them. What protocol is error recovery native to?
TCP - Transmission Control Protocol
At what layer does a MAC address get used?
Layer 2
What does the acronym URL mean?
Uniform Resource Locator
What does the acronym "OSI" stand for?
Open Standards Interconnection
When data is stored in a cache to wait until it can be sent over the line what state is the data in?
Buffering
Parts and Pieces - More like Ports and... tabs? When a web browser has multiple tabs open how does a web server know which one to send it to?
Each tab has a port on the extended range (1024+)
The acronym "MAC" in MAC Address stands for what?
Media Access Control
HTTP stands for this
Hypertext Transfer Protocol
This word means to wrap data up before it's sent out - starts with an "E"
Encapsulation
*Daily Double* This type of address is used at the Transport Layer to make sure data gets to the correct applications
Ports
FTP uses these commands to add data to, and take data from, a server
PUT and GET
The MAC address on your computer has 2 parts. What are these parts (list and describe)?
OUI (Organizationally Unique Identifier) and NIC (Network Interface Card) Identifier
The three way handshake of a computer accessing a web server goes like this:
SYN
SYN ACK
ACK
Nexflix, and other streaming services, use this protocol in please of TCP to transmit their data to you (hint: no error recovery)
UDP: User Datagram Protocol
The 3 "F"'s of switching are these:
Filter, Flood, Forward
What two parts, in conjunction, tell the receiving computer that a data stream is incoming?
The Preamble and the Starting Delimiter
A switch contains this type of table within its memory to be able to forward to a certain computer based on its unique layer 2 address
MAC Address Table
*Double Jeopardy* POP3, SMTP, and IMAP4: Only 1 of these allows users to access a centralized e-mail server that updates on all devices simultaneously - which one?
IMAP4 (Think Gmail)
From layer 7 down name the PDUs that represent what types of information being sent over (hint: bits on the physical layer)
Layer 7: Data
Layer 6: Data
Layer 5: Data
Layer 4: Segment
Layer 3: Packet
Layer 2: Frame
Layer 1: Bit
FTP stands for this
File Transfer Protocol
HTTP, HTTP/2, and HTTP/3 are similar in how they work with getting data to the destination but how do they differ in how they deliver it?
HTTP:Alternating HTTP GET then HTTP OK with single piece of data
HTTP/2:HTTP GET then single HTTP OK with all data at once
HTTP/3:HTTP GET then multiple HTTP OK one after the other with all data
How many bits is a MAC Address?
48 bit
I lied that this wouldn't be on your review (don't worry, it's not on the test): Take these binary numbers, turn them into decimal numbers, and then add them to get the final answer.
01000010 + 10000101 + 00000001 = ?
66 + 133 + 1 = 200