![Enabling Routing for Single-Interface Systems - Configuring and Administering Network Components in Oracle® Solaris 11.2 Enabling Routing for Single-Interface Systems - Configuring and Administering Network Components in Oracle® Solaris 11.2](https://docs.oracle.com/cd/E36784_01/html/E37475/figures/nwt_multpl_routers.jpg)
Enabling Routing for Single-Interface Systems - Configuring and Administering Network Components in Oracle® Solaris 11.2
![cisco - Whats's the function of a loopback interface in routing protocols? - Network Engineering Stack Exchange cisco - Whats's the function of a loopback interface in routing protocols? - Network Engineering Stack Exchange](https://i.stack.imgur.com/TLEFV.png)
cisco - Whats's the function of a loopback interface in routing protocols? - Network Engineering Stack Exchange
![Interface and Line Numbers in Cisco Routers - DavidontheCloud.com - David Papkin Technical Resources Interface and Line Numbers in Cisco Routers - DavidontheCloud.com - David Papkin Technical Resources](http://www.cisco.com/c/dam/en/us/support/docs/routers/3725-multiservice-access-router/62611-62611a.gif)
Interface and Line Numbers in Cisco Routers - DavidontheCloud.com - David Papkin Technical Resources
![Can't ping a router's interface which is in a WAN directly connected to my router- (Packet tracer) - Network Engineering Stack Exchange Can't ping a router's interface which is in a WAN directly connected to my router- (Packet tracer) - Network Engineering Stack Exchange](https://i.stack.imgur.com/osVDI.png)