7.1 Flashcards
This is a critical concepts in this module and in modern networking
Abstraction
Decision making doesn’t always happen directly on the hardware routers and switches – it can be extracted to another device or even to software running in a – – – – – – –
Virtual machine
Examples of Netwerk abstraction include the following
Networking devices might be controlled remotely, exist as a virtual device, only exist as logical constructs
The overall network design devices involves How they areconfigured, the services implemented to support the net work, and the way devices are connected to the network is calling networks – – – – –
Architecture
Networks rely increasingly on switch base technologies, manage switches and ——————switches play much more critical role in an enterprise environment
Layer three
A – – – – – – – – provides plug and play simplicity with minimal configuration options and has no IP address assigned to it. Limited capabilities but inexpensive
Unmanaged switch
A – – – – – – – – Can we can figure it through CLA or web-based GUI and sometimes can be configured in groups. They are also assigned IP addresses for the purpose of continued management
Manage switches
Capable of intercepting layer three data and can work much like a router, supporting the same routing protocols and making routing decisions. Less expensive than routers and are designed to work on large LAN providing faster layer three traffic management within the confines of a known Netwerk architecture
Layer three switch
The primary difference in the way the hardware is built but is in fact it is often difficult to distinguish between a layer three switch and the router. In some cases the difference comes down to what the manufacturer has decided to call the device to
Improve sales
Capable of intercepting lawyer for data. They operate anywhere from layer 4 to 7 and they also Known as contents switches or application switches. Among other things the ability to enter interpret higher layer data enable switches to perform advance filtering
Later 4 switch
Features of wire three and lawyer for switches vary widely Penny on the dash – – – price point
Manufacture
 You design a large Netwerk with several interconnected switches to make the network more fault-tolerant you install multiple or redundant switches add critical jokers this – – – – – – – allows data the option of traveling through more than one switch towards its destinations and make your network less vulnerable to hardware malfunctions
Redundancy
If not limited in someway these redundant broadcast transmissions will flood the Netwerk which are called – – – – – – – –, and a high traffic limbo severely impaired network performance or possibly disable the network entirely
Broadcast storm
To eliminate the Possibility of this and other types of traffic loops the – – – – – – – – – was developed by Ryan Perlman at Digital Equipment Corporation 1985 and then adopted in by the IEEE in 1990
STP or standing tree protocol
The first iteration of STP define IEEE standard ———-the functions at the data link layer it prevents traffic is also called switching lives by calculating pastor avoid potential loose ends are artificially blocking the links that would come pleat a loop
802.1D
