OSI Basics
Name the two sublayers of the Data Link layer.
Logical Link Control (LLC) and Media Access Control (MAC)
How many layers does OSI have?
7
Which layer sends raw bits through cables or signals?
Physical layer
Which layer makes sure data arrives correctly?
Transport layer
Which layer starts and ends communication?
Session layer
What does OSI stand for?
Open Systems Interconnection
Which model is actually used on the internet today?
TCP/IP
Which layer uses MAC addresses?
Data Link layer
Which protocol is reliable: TCP or UDP?
TCP
Which layer encrypts data?
Presentation layer
What is a protocol?
A set of rules for how data is sent and received
How many layers does TCP/IP have?
4
Which layer uses IP addresses?
Network layer
What do port numbers help identify?
Applications/programs
Which layer is closest to the user?
Application layer