GATEWAY

• INTERNETWORKING TECHNOLOGIES

GATEWAY:
•A device that connects networks is called a gateway.
•Gateways provide a communication path so that data can be exchanged between networks.
•Operate at the transport layer and higher
•Protocol converter
•Much more complex than a router
• May provide protocol conversion
• For connecting internetworks
• Keeps sophisticated routing tables
• Operates well in a heterogeneous environment
• Large buffer space
• Can control traffic flow

https://docs.google.com/viewer?a=v&q=cache:LjXw9KjlhF0J:cis.bentley.edu/jgorgone/cs340/C/pdf/interconnect.pdf+&hl=en&pid=bl&srcid=ADGEESjZqjU_tOK_VtQTUbzl0TzFo_EhxOOV6eD6iVGX0Wt42lxE6ngbsUOUUgsAvPH3LWMWgpH_ZvYLQePeLpCLtBIXe0WkBR7Ki9ftSF_n6_naqPZiwx6z8qPvxQU10M9_uxDzf0R2&sig=AHIEtbThB3Z1YQPB6TqRCTV6qnawZ57q_A

• Gateways: 

Connecting Networks Above the Network Layer

• Gateways connect dissimilar networks; networks that do not share a common physical, data link, or network layer protocol
– A gateway can connect two or more networks above the network layer of the OSI model
• A gateway reconciles differences between the networks it connects and serves as a protocol converter
• In some instances, a complete network or WAN service may serve as a gateway between two networks

https://docs.google.com/viewer?a=v&q=cache:FLDLvVwOJ1EJ:userfs.cec.wustl.edu/~t82531a/ch13_PPT.ppt+&hl=en&pid=bl&srcid=ADGEESiBldY75YIEUdwJ28pXtAA6S2Af16t4BTX83TkDY1n6XYYaaWivSCMNx8g25CWZGwkIA787Gn9GGqlCz_MYkxH-8b4YG8p5mJgB1V2Cx7eBk_l4LmmMYToJH_AHG23cWW-hAYLS&sig=AHIEtbT8Im2bqnZx0WUn49jKJdTFQ_fkaw