What is the border gateway protocol (BGP)? 

InstaBlaster...

I bet there's a video somewhere

Packet Pushers channel on here. Russ White BGP course.

Benedict Rodrigues z xxxcom

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A home LAN is an example of an autonomous system. All computers, iPad, iPhone, nest cameras, smart TV etc on a LAN have a routing table, which typically has three routes. However the router, provided by your ISP, for your LAN has a large routing table that constantly needs to be updated. Routes need to be added in the routers table or existing routes need to be modified. These updates are sent by other routers on the internet (outside of your home LAN). For routers to be able to talk to each other there needs to be a protocol. That protocol is BGP.

Routing tables are used on all routers. “Autonomously learn” has nothing to do with any of this.

Yes they could be an ISPs

I come here to revise my concepts , what could have happened in Canada is as we all know routers are mechanical parts and they deteriorate with time and that's why its so important to maintain them, so in this case the Rogers may have become faulty and as it might have been a major router and majority of traffic might be flowing through it so as it became faulty the entire network broke .But you will see that only around 60 % people might have been affected this is because we have other major routers too , so one reason is the network centers aren't maintaining the routers properly and these are mostly government organizations so you must ask government questions as you guys are paying your taxes , hopefully its not a big deal but such kind of thing can make the nation lose a lot of money and power even though its negligible it shouldn't happen . The same situation happened in my country India during 2005 but I am happy we are doing quite well now .

Number of hops

To answer this question abit late. Here he explains distance vector protocol which for example RIP, RIPv2 and older protocolls which BGP decends from uses. Except BGP is abit different and it actually use Path vector protocol

Artyte B. Sort of but hop count is not used as a metric. Autonomous systems are used to gauge distance from one point to another. BGP update messages are sent between routers that include NLRI and path attributes, which are used to determine which routes are best.

Sorry cause I think I am a little late to reply. At first, A knows how to reach to A, so it broadcasts itself to its neighbours. Now B and C knows that A is directly connected to them, so their routing tables are respectively B:0, A:1 and C:0, A:1. Now both of them broadcasts themselves and reaches D. So now D knows how to reach to B and C and they know how to reach to A. So D's routing table looks like D:0, B:1, C:1, A:B:2, A:C:2. Now D broadcasts itself and B and C know that they can reach D. Their routing tables get updated. When B gets the routing table of D, it ignores the value of A, because it knows that it has a direct connection, but update the connection for C. The same for C. When B and C re-advertise themselves, A gets itself back, and now it knows the route to D. Finally, A broadcasts, but no effect, since B, C and D already know the minimum cost paths to everywhere. Now the process it complete. For practical purposes, this routers advertise themselves periodically, or when there is a change in one or more of the links.

If the clouds A B C D are far away those connection are probably a fibers that run under the ground to give physical connection

excatly

good joke

Just the nerds :>

Me 😂

Only oneself is 0 hop. Directly connected ones are 1 hop.

A directly connected router is 1 hop away. It’s networking fundamentals.

@Omar Aziz What is the difference between the two?

lmfaoo

He could def kick some AS

lmao same

...if Jessie didn't smoke meth

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