Ch1 Switch Networking Intro Flashcards
converged network
Network combining various services such as telephone, VOIP, voice messaging, mobile devices, and other automated systems into one network
Cisco Borderless Network
network architecture that allows users to access network from any location without sacrificing security or speed.
Borderless Design Principles (w/def)
- Hierarchical - defining the role of each device at every tier clearly.
- Modularity - allows for seamless expansion and integrated services on-demand
- Resiliency - making sure the network is always up and accessible - fault tolerance
- Flexibility -allows spreading the traffic load over all network resources.
Three Layers of Tiered Borderless Network (w/def)
- Access - “edge” of network ; responsible for controlling access to and from network
- Distribution - interfaces between access and core layers; allows use of intelligent switching and interaction with larger scale network segments.
- Core - network backbone
PSTN
Public Switched Telephone Network
Three Types of Switch Configurations (w/def)
- Fixed Configuration Switches - switches whose capabilities are all built-in and non-changeable
- Modular Configuration Switches - switches whose capabilities are expandable by use of extra modules.
- Stackable Configuration Switches - switches that can be interconnected with each other and effectively operate as one large switch.
Switch Selection Considerations
- Cost
- Port Density
- Power
- Port Speed
- Frame Buffers
- Scalability
frame forwarding
The process of how a device passes frames through the network; LAN switches maintain table that determines where frames are sent;
What data allows LAN switches to forward frames within a network?
MAC Address of Source and Destination
ingress
Port where frame enters..
egress
Port where frame leaves the switch.
content addressable memory (CAM) table
- Also known as MAC address table.
- Table where the MAC address of all members of the network are stored to allow for reliable and timely frame forwarding
Store and Forward Switching
Receives entire frame and checks for errors before forwarding it to its destination.
Two Features of Store and Forward Switching
- Error Checking - drops error frames.
- Automatic Buffering - Good for different speed ports.
Cut Through Switching
Starts forwarding a frame as soon as its destination MAC is determined.