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What can be a gateway as shown in the output of command `route`?

-1

1

In the output of route -n, there is a column named "gateway".

What can be a gateway?

I thought a gateway between two networks is a device explicitly designated to be a gateway, out of several devices connected to both networks. That was my impression when I heard that I could find out gateways from the output of route -n.

But now suppose that I am to add a line to the routing table, so I have to pick a gateway, without looking up the routing table.

Is a gateway between two networks just any (meaning without being explicitly designated) device

• with two network interfaces connected to the networks respectively, and




• with a routing table allowing packets to be transmitted from a network to the other (Is it correct that every device in network(s) has a routing table?)
  ?

Is a gateway a bi-directional or uni-directional concept? In other words, is a gateway for two networks, or from a network to a second network?

Thanks.

route gateway

share|improve this question

edited yesterday

Tim

asked yesterday

TimTim

28.3k78269490

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  I'm voting to close this question as off-topic because it’s not about Unix or Linux.
  
  – Stephen Kitt
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The route command is specific to OS. If this question is posted on networkingengineering.se, it will be closed as OS specific. They want nothing about OS, user programs/commands, or application level.
  
  – Tim
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You could remove all mention of the route command and its output from this question without changing it (or potential answers), so no, this question is not OS-specific.
  
  – Stephen Kitt
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I put it under the context of route command, hoping that it can resonate with other Linux/Unix users.
  
  – Tim
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That doesn’t change the fact that it’s off-topic.
  
  – Stephen Kitt
  yesterday
  

  
  
  
  

 | 
show 7 more comments

-1

1

In the output of route -n, there is a column named "gateway".

What can be a gateway?

I thought a gateway between two networks is a device explicitly designated to be a gateway, out of several devices connected to both networks. That was my impression when I heard that I could find out gateways from the output of route -n.

But now suppose that I am to add a line to the routing table, so I have to pick a gateway, without looking up the routing table.

Is a gateway between two networks just any (meaning without being explicitly designated) device

• with two network interfaces connected to the networks respectively, and




• with a routing table allowing packets to be transmitted from a network to the other (Is it correct that every device in network(s) has a routing table?)
  ?

Is a gateway a bi-directional or uni-directional concept? In other words, is a gateway for two networks, or from a network to a second network?

Thanks.

route gateway

share|improve this question

edited yesterday

Tim

asked yesterday

TimTim

28.3k78269490

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  I'm voting to close this question as off-topic because it’s not about Unix or Linux.
  
  – Stephen Kitt
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The route command is specific to OS. If this question is posted on networkingengineering.se, it will be closed as OS specific. They want nothing about OS, user programs/commands, or application level.
  
  – Tim
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You could remove all mention of the route command and its output from this question without changing it (or potential answers), so no, this question is not OS-specific.
  
  – Stephen Kitt
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I put it under the context of route command, hoping that it can resonate with other Linux/Unix users.
  
  – Tim
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That doesn’t change the fact that it’s off-topic.
  
  – Stephen Kitt
  yesterday
  

  
  
  
  

 | 
show 7 more comments

In the output of route -n, there is a column named "gateway".

What can be a gateway?

I thought a gateway between two networks is a device explicitly designated to be a gateway, out of several devices connected to both networks. That was my impression when I heard that I could find out gateways from the output of route -n.

But now suppose that I am to add a line to the routing table, so I have to pick a gateway, without looking up the routing table.

Is a gateway between two networks just any (meaning without being explicitly designated) device

• with two network interfaces connected to the networks respectively, and




• with a routing table allowing packets to be transmitted from a network to the other (Is it correct that every device in network(s) has a routing table?)
  ?

Is a gateway a bi-directional or uni-directional concept? In other words, is a gateway for two networks, or from a network to a second network?

Thanks.

route gateway

share|improve this question

edited yesterday

Tim

asked yesterday

TimTim

28.3k78269490

share|improve this question

edited yesterday

Tim

asked yesterday

TimTim

28.3k78269490

share|improve this question

edited yesterday

Tim

asked yesterday

TimTim

28.3k78269490

asked yesterday

TimTim

28.3k78269490

asked yesterday

TimTim

28.3k78269490