Week 3: Switch Fundamentals Flashcards
Why segment a Network?
- Limit broadcast traffic
- Allows for easier security
- Can isolate and limit outages
- more bandwidth per user and is more scaleable.
How large does a typical NW need to grow before recommending segmentation?
Larger than a /24
What can be used to segment a network?
VLANs
Different subnets
What info is used by a switch to forward Ethernet frames?
- Source and Destination MAC addresses
2. All decisions are processed in hardware and therefore are wire speed.
What command is used to view the CAM table?
“show mac-address-table”
List Switch models that are fixed in design.
2950, 2960, 3550, 3560, 3750,3850
List Switch models that are modular in design. Modular switches typically have 4 blade slots.
6508,6509,4500, and Nexus 7k
What is the operating system for a 3750X?
IOS
What is the operating system for a Nexus 5k?
NXOS
List 3 different modes available within the command line interface
User EXEC
Priv EXEC
Configuration
What is one command that is not available from the User Mode? (User mode is before you have enabled the device.)
Show running-configuration
What are examples of menus that contain sub-commands within IOS?
- Line Configuration
2. Interface Configuration
Why use switch stacks?
- Allows for single configuration and reduces complexity.
Fixed configuration switch
A switch that come with a pre-configured layout and number of ports.
•Are usually lower end switches and switches destined for very specific functions
•Cisco 3750 is an example
Modular Switch
A switch that has open slots for expansion. Typically higher end switches designed for central locations (like backbone) where a lot of data comes into one location.
•They have plenty of redundancy features, such as redundant power supplies.
•Cisco 4507 is an example
