Computer Networking CH 5 and OSI Model Examination: In-Depth
Analysis of the OSI Model's Five Layers, Packet Routing Techniques,
Router Input and Output Management, Source-to-Destination Path
Determination, Network Layer Protocols, Data Flow Optimization, IP
Addressing Schemes, Transport Layer Protocols, Session Management,
Presentation Layer Functions, Application Layer Services, Network
Topologies, Routing Algorithms, Switching Techniques, Protocol Stack
Integration, Data Link Layer Protocols, Physical Layer Specifications,
Error Detection and Correction, Network Security Protocols, and
Advanced Networking Architectures Exam Questions Verified and
Provided with Complete A+ Graded Rationales Latest Updated 2026
5 - Layers of Networking (OSI Model)
5. Application
4. Transport
3. Network
2. Link
1. Physical
Application Layer Communication Data Unit
Message
,Data Link Layer Communication Data Unit
Bits
Network Layer Communication Data Unit
Packets
Transport Layer Communication Data Unit
Segments
Application Layer Protocol(s)
HTTP
Link Layer Protocol(s)
Ethernet
Network Layer Protocol(s)
IP, ARP, ICMP
Transport Layer Protocol(s)
TCP/UDP
, Functions of the Network Layer:
1. Forwarding: moving packets from router's input to appropriate router output
2. Routing: determining the route taken by packets from source to destination
Two Approaches to Structuring Network Control Plane:
1. Per-router control
2. Logically centralized control
Per-router control plane
Individual routing algorithm components in each and every router interact in the control plane.
Software-Defined Networking(SDN) Control Plane
Remote controller computes, installs forwarding tables in routers
Routing Protocol Goal:
determining "good" paths from sending hosts to receiving hosts through a network of routers.
Path:
sequence of router's packets traverse from given initial source hots to destination host.
Analysis of the OSI Model's Five Layers, Packet Routing Techniques,
Router Input and Output Management, Source-to-Destination Path
Determination, Network Layer Protocols, Data Flow Optimization, IP
Addressing Schemes, Transport Layer Protocols, Session Management,
Presentation Layer Functions, Application Layer Services, Network
Topologies, Routing Algorithms, Switching Techniques, Protocol Stack
Integration, Data Link Layer Protocols, Physical Layer Specifications,
Error Detection and Correction, Network Security Protocols, and
Advanced Networking Architectures Exam Questions Verified and
Provided with Complete A+ Graded Rationales Latest Updated 2026
5 - Layers of Networking (OSI Model)
5. Application
4. Transport
3. Network
2. Link
1. Physical
Application Layer Communication Data Unit
Message
,Data Link Layer Communication Data Unit
Bits
Network Layer Communication Data Unit
Packets
Transport Layer Communication Data Unit
Segments
Application Layer Protocol(s)
HTTP
Link Layer Protocol(s)
Ethernet
Network Layer Protocol(s)
IP, ARP, ICMP
Transport Layer Protocol(s)
TCP/UDP
, Functions of the Network Layer:
1. Forwarding: moving packets from router's input to appropriate router output
2. Routing: determining the route taken by packets from source to destination
Two Approaches to Structuring Network Control Plane:
1. Per-router control
2. Logically centralized control
Per-router control plane
Individual routing algorithm components in each and every router interact in the control plane.
Software-Defined Networking(SDN) Control Plane
Remote controller computes, installs forwarding tables in routers
Routing Protocol Goal:
determining "good" paths from sending hosts to receiving hosts through a network of routers.
Path:
sequence of router's packets traverse from given initial source hots to destination host.
