OSI Transport Layer:
Transport Layer
Accepts data from Application layer and prepares it for layer 3;
Responsible for end to end transfer of data.
Enables multiple applications to communicate simultaneously.
Ensures data received reliably and in order.
Employs error handling mechanisms.
Tags: cisco, 802.1q, guides, router, vlan, ip
Application – Interface Between Human and Data
Applications generate most network traffic.
Application layer:
Provides the interface between Applications and underlying networks;
Contain many different protocols:
TCP/IP
Predates the OSI model;
Application layer equal to the top 3 layers of OSI Layers;
Implements little functionality at Pressentation and Session layers.
Tags: ip, cisco, router, study, wan, vtp
Communicating over the Network.
Local Area Network (LAN)
A LAN is a network confined to a relatively small space. (still like an island but a little bigger);
Lan’s are a single enterprise that is locally administered.
Problem faced with a LAN – How to share information in different geographic areas.
Tags: wan, cisco, 802.1q, ip, switch, router
