01 CNSF: Study Guide OSI and Network Topologies

What layer of the OSI model is responsible for end-to-end communication and flow control?

• Network Layer
• Transport Layer
• Data Link Layer
• Physical Layer

Which protocol is used for routing data across different networks and at which OSI layer does it operate?

• FTP

• TCP, Transport Layer
• IP

• Presentation Layer

• Network Layer

Physical is ​ (a)   and used for the local network, Logical is ​ (b)   and used for routing.

• MAC
• IP
• Application
• PO

What OSI layer would a Switch and ARP protocol be associated with?

• Application Layer
• Presentation Layer
• Data Link Layer
• Transport Layer

As data moves from higher layers to lower layers, headers (and sometimes trailers) are added to the data at each layer in a process called ​ (a)  

As data moves from the lower layers to the higher layers (like when it's being received), these headers/trailers are stripped off at each corresponding layer in process called ​ (b)  

• Encapsulation
• De-Encapsulation

​ (a)   Provides network services to end-user APIs and other back-end services.

​ (b)   Handles the routing and choosing the best path of data between different nodes on a network.

​ (c)   Deals with the actual connection and connectors as data moves between devices.​

​ (d)   Manages and controls the dialog between two devices.

• Application
• Network
• Physical
• Session
• Transport
• Data Link

​ (a)   USB, Ethernet, Bluetooth, ISDN

​ (b)   ARP, MAC, PPP, Switch

​ (c)   IP, ICMP, OSPF, RIP, BGP

​ (d)   TCP, UDP, SCTP

​ (e)   HTTP, FTP, SMTP, POP3, SNMP

• Physical:
• Data Link:
• Network:
• Transport:
• Application:
• Location

At which layer of the OSI model would you find a switch operating?

• Network Layer
• Data Link Layer
• Physical Layer
• Transport Layer

Which protocol is specifically designed to ensure secure communication over the internet?

• HTTP
• FTP
• SMTP
• HTTPS

Which of the following is a protocol used at the Application Layer of the OSI model?

• TCP
• IP
• Ethernet
• POP3