Networking Architecture

SCCC Study Cards

Name and define the 3 communication modes of the Session Layer.

The three communication modes of the Session Layer are: 1) Simplex: data transmitted in a single direction/one-way communication; 2) Half-Duplex: data transmitted in both directions, one direction at a time/two-way communication, but not simultaneous; 3) Full-Duplex:data transmitted in both directions, at the same time/ simultaneous two-way communication.

Presentation Layer protocols serve as ___________ ​

between the application and network.

translator

The Application Layer is the main interface ​

between ___________ and _________.

the application and the network

What is a network?

two or more computing devices connected for the purpose of communicating with one another in order to share information and/ or resources.

What is the OSI Model?​

The Open Systems Interconnection (OSI) Model describes how information from a software application in one computer moves through a network medium to a software application in another computer. It is a conceptual model composed of seven layers, each specifying network functions.

What are the 7 layers of the OSI Model, from Layer 1-7?

Physical, Data Link, Network, Transport, Session, Presentation, Application

What is the name of Layer 3 of the OSI Model?​

Network Layer

Name a OSI Layer 3 device.

Router

Name two addressing protocols

IPv4 and IPv6

What is the name of Layer 1 of the OSI Model?​

Physical Layer

Name a OSI Layer 1 device

Hub, Repeater, Modem, NIC, Cables​

What are the different network types?

• LAN - Local Area Network ​

• WAN - Wide Area Network​

• WLAN - Wireless Local Area Network ​

• MAN - Metropolitan Area Network​

• CAN - Campus Area Network, Controller Area Network, or sometimes Cluster Area Network​

• PAN - Personal Area Network

Define Topology

Topology is a way of “laying out” the network​

_______topologies describe how cables are run​

Physical

_______topologies describe how network messages travel​

Logical

What are the 8 network topologies?

• Bus​

• Star​

• Ring​

• Mesh​

• Point-to-point​

• Point-to-multipoint​

• Hybrid​

• Wireless

What is a bus topology?

A bus topology uses one cable as a main trunk to connect all of the systems togethe. A bus topology is easy to set up and requires no additional hardware, such as a hub. The cable is also called a trunk, a backbone, or a segment​

trunk, a backbone, or a segment.​

​

What is a start topology

A star topology's computers are connected to a central point with their own individual cables or wireless connections. ​You'll often find that central spot inhabited by a device like a hub, a switch, or an access point.​