Podcast
Questions and Answers
Which network layer function is optional?
Which network layer function is optional?
- Congestion control (correct)
- Routing
- Forwarding
- Addressing
What is a basic function of a transparent bridge?
What is a basic function of a transparent bridge?
- Learns where stations are attached to the LAN (correct)
- Prevents loops in the topology
- Routes packets between networks
- Forwards frames from one LAN to another
What type of service does the IP network layer offer?
What type of service does the IP network layer offer?
- Connection-oriented reliable stream service
- Guaranteed delay service
- Best-effort connectionless service (correct)
- Error-free packet delivery service
Why is the network layer considered the most complex layer?
Why is the network layer considered the most complex layer?
Is it true that an end-to-end function is best implemented at a higher level than at a lower level?
Is it true that an end-to-end function is best implemented at a higher level than at a lower level?
What is an essential network function?
What is an essential network function?
Which device operates at the network layer?
Which device operates at the network layer?
What is a characteristic of the network layer?
What is a characteristic of the network layer?
What is the primary function of the session layer in the OSI model?
What is the primary function of the session layer in the OSI model?
In the TCP/IP model, which layer performs the functions of the session layer?
In the TCP/IP model, which layer performs the functions of the session layer?
When data is sent from device A to device B, which layer receives the data at B in the OSI model?
When data is sent from device A to device B, which layer receives the data at B in the OSI model?
What is the function of the application layer in the TCP/IP model?
What is the function of the application layer in the TCP/IP model?
Which layer is missing from the TCP/IP model?
Which layer is missing from the TCP/IP model?
When data is sent from device A to device B, which layer receives the data at B in the TCP/IP model?
When data is sent from device A to device B, which layer receives the data at B in the TCP/IP model?
What is the primary function of the transport layer in the TCP/IP model?
What is the primary function of the transport layer in the TCP/IP model?
Which layer provides the mechanism for opening, closing, and managing a session between end-user application processes?
Which layer provides the mechanism for opening, closing, and managing a session between end-user application processes?
What is the primary function of a Virtual Private Network (VPN)?
What is the primary function of a Virtual Private Network (VPN)?
In which device is the application layer implemented?
In which device is the application layer implemented?
What is the function of the transport layer in the end system?
What is the function of the transport layer in the end system?
Which layer is responsible for delimiting and synchronizing data exchange?
Which layer is responsible for delimiting and synchronizing data exchange?
What is the primary function of the network layer?
What is the primary function of the network layer?
In which device is the network layer implemented?
In which device is the network layer implemented?
What is the primary function of the physical layer?
What is the primary function of the physical layer?
Which layer is responsible for providing enhanced security and online anonymity to users on the internet?
Which layer is responsible for providing enhanced security and online anonymity to users on the internet?
Study Notes
Network Fundamentals
- Network devices: repeaters, bridges, routers (all of the mentioned)
Network Layer Functions
- Congestion control is optional
- Forwarding is a required function
- Routing is a required function
Transparent Bridge Functions
- Learns where stations are attached to the LAN
- Forwards frames from one LAN to another
- Prevents loops in the topology (all of the mentioned)
IP Network Layer Services
- Offers best-effort connectionless service
- Does not offer connection-oriented reliable stream service or connection-oriented transfer of packets with delay guarantee
Network Layer Complexity
- Reasons for complexity: addressing and routing challenges, requiring coordinated actions of multiple, geographically distributed network elements
End-to-End Functions
- Best implemented at a lower level than at a higher level (True)
Essential Network Functions
- Link layer is an essential network function
OSI Model and TCP/IP Model
- In OSI model, the 5th layer to receive data is the Session layer
- In TCP/IP model, the 5th layer to receive data is the Application layer
Application Layer
- Implemented in end systems
- Provides the interface between applications and the network
- Enables users to send and receive data across shared or public networks
Transport Layer
- Implemented in end systems
- Handles process-to-process delivery of packets through ports
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Description
Test your knowledge of computer networks with these questions on network devices, layer functions, and bridge operations.
