Used Extreme 45014 Switch Modules for Sale Short Description: Used / Refurbished Extreme Networks Alpine 3800 Switch Management Module - Line Card - Blade with Basic Layer 3 Switching for Alpine 3808 and 3804 Chassis (Extreme Networks 45014). (Extreme Alpine 3800 series) If you are looking to buy new or used and refurbished Extreme Switch Modules, you can stop searching. Vology has over $50 million of inventory stocked in our warehouse. In addition, we have one of the largest sourcing networks in the industry to locate your Extreme 45014 fast at the best price possible. *Pricing in our market changes very rapidly, therefore, by contacting us right now you could save more money today vs. tommorow. Request a Quote for Pricing and Availability from Experts in the Industry! * E-mail Address: * Contact Name: * Phone Number: * Company Name:   Manufacturer   of Interest: Select MFG Cisco Nortel Extreme HP Avaya Kemp F5 Foundry/Brocade Juniper Other   How did you Hear   About Us?: Provide us Insight ---Search Engines--- Google Search Yahoo Search Live / MSN Search ----------------- Business.com Shopping Site B2B Wholesale Site Ebay Word of Mouth Return Customer Other * Items:

45014 Product Specifications

Alpine 45014 Switch Management Module with Basic Layer 3 and ExtremeWare License for Alpine 3804 and 3808 Series Chassis (Aka SMMi Module).

Extreme Alpine Compatible Chassis

• Extreme 3804 5-slot Chassis (3800 Alpine Series)
• Extreme 3808 9-slot Chassis (3800 Alpine Series)

What is Layer 3 of OSI Model?

The network layer is level three of the seven level OSI model as well as of the five layer TCP/IP model. In the four layer TCP/IP reference model it is called Internet layer, which is the second layer from below. In all of the models, the network layer responds to service requests from the transport layer and issues service requests to the data link layer.

In essence, the network layer is responsible for end to end (source to destination) packet delivery, whereas the data link layer is responsible for node to node (hop to hop) packet delivery.

The network layer provides the functional and procedural means of transferring variable length data sequences from a source to a destination via one or more networks while maintaining the quality of service requested by the transport layer. The Network layer performs network routing, flow control, network segmentation/desegmentation, and error control functions.

The network layer deals with transmitting information all the way from its source to its destination - transmitting from anywhere, to anywhere. Here are some things that the network layer needs to address:

• Is the network connection-oriented or connectionless? For example, snail mail is connectionless, because you can send a letter to someone without them doing anything and they will receive the letter. On the other hand, the telephone system is connection-oriented, because the other party is required to pick up the phone before communication can be established. The OSI Network Layer protocol can be either connection-oriented, or connectionless. The TCP/IP Internet Layer (equivalent to OSI's Network Layer) supports only the connectionless Internet Protocol (IP).
• What are the Global Addresses? Everybody in the network needs to have a unique address which determines who they are. This address will normally be hierarchical, so you can be "Fred Murphy" to Dubliners, or "Fred Murphy, Dublin" to people in Ireland, or "Fred Murphy, Dublin, Ireland" to people anywhere in the world. On the internet, these addresses are known as IP Addresses.
• How do you forward a message? This is of particular interest to mobile applications, where a user may rapidly move from place to place, and it must be arranged that his messages follow him. Version 4 of the Internet Protocol (IPv4) doesn't really allow for this, though it has been hacked somewhat since its inception. Fortunately, the forthcoming IPv6 has a much better designed solution, which should make this type of application much smoother.