I'm struggling to understand the difference between "gateway" and "interface". What I have so far is: 1) Gateway = the next hop to the desired destination. 2) Interface = a packet's exit point on the way to that destination. Is that right?
If understand correctly. Interface = physical port / logical port (where the packet is going to enter or exit) Gateway = Router (think of it as the literal gateway to the next hop / router)
Think of network interface being each physical network card(s) in the router. (These can also be virtual interfaces where you split up a physical network card into multiple interfaces) A router connects different networks (or IP subnets) so there will be at least two network interface cards on a router. (I have seen routers with 10’s on network interfaces) Each of these network interface cards has an IP address a subnet mask and a gateway defined. A gateway is the next hop or router according to the gateway IP address defined on the network interface according to the routers routing table. Hope that helps.
/32 is being used because it is choosing a specific device. For example, if I were to send a packet to a specific computer, calling to 10.1.1.64/24, would mean that I am sending to the entire network of computer that is in the subnet of 10.1.1.64/24. If I wanted to directly send it to a specific device, I would need to put in /32 at the end, because that would mean that in that particular /32 network, there is only one device. In the video example, 192.168.1.22 is the specific computer, so it would refer itself as /32. Since broadcast address is 192.168.1.255 in this case, it ends it with /32
Why do you need an entry in the routing table on the outer router pointing to the local Laptop network? Can not this data response be handled via NAT to make sure the data returned from the internet reachs its final destination on the laptop? If you do that, you would need an entry on your outer router for every subnet you may have, seems a bit overkill
Even with NAT, you will still need a route to the destination network. If it seems like routing tables could be complex and difficult to manage, then you're starting to understand routing tables.
The network address translation process and the routing process are separate functions in a layer 3 device. NAT may not require routing, and routing may not be associated with NATed traffic. Depending on the direction of traffic flow, the translation may occur first, and afterwards the traffic may be evaluated to determine the proper route.
@@chrisbowen2093 About 40% of the N10-008 includes exam objectives that are new from the N10-007. They are different enough that you would need to restart your studies if you shifted to the N10-008. The N10-007 will be around until June 2022, so you've got plenty of time to study and pass your exam. Regardless of which exam you take, the certification you earn is identical. There's no advantage with the certification to passing the N10-008 over the N10-007.
My brain melting ;_;
This made me lol and then cry on the inside
good to know that im not alone... lol
Hang in there, we got this!
@@ascheme9705 just gotta keep watching and studying. I hope 2023 will be my year for this
@@Adrastus_ I hope so as well
Thank you for all your work!😁
Love the bunnies! aww
Thank you for these videos.
I'm struggling to understand the difference between "gateway" and "interface". What I have so far is:
1) Gateway = the next hop to the desired destination.
2) Interface = a packet's exit point on the way to that destination.
Is that right?
@@nousquest That's a helpful summary, thank you!
If understand correctly.
Interface = physical port / logical port (where the packet is going to enter or exit)
Gateway = Router (think of it as the literal gateway to the next hop / router)
Think of network interface being each physical network card(s) in the router. (These can also be virtual interfaces where you split up a physical network card into multiple interfaces)
A router connects different networks (or IP subnets) so there will be at least two network interface cards on a router. (I have seen routers with 10’s on network interfaces)
Each of these network interface cards has an IP address a subnet mask and a gateway defined. A gateway is the next hop or router according to the gateway IP address defined on the network interface according to the routers routing table. Hope that helps.
I have a question on the Destination column:
why does one address have a /24 suffix and the other 2 have a /32 suffix?
/32 is being used because it is choosing a specific device. For example, if I were to send a packet to a specific computer, calling to 10.1.1.64/24, would mean that I am sending to the entire network of computer that is in the subnet of 10.1.1.64/24. If I wanted to directly send it to a specific device, I would need to put in /32 at the end, because that would mean that in that particular /32 network, there is only one device. In the video example, 192.168.1.22 is the specific computer, so it would refer itself as /32. Since broadcast address is 192.168.1.255 in this case, it ends it with /32
Why do you need an entry in the routing table on the outer router pointing to the local Laptop network? Can not this data response be handled via NAT to make sure the data returned from the internet reachs its final destination on the laptop? If you do that, you would need an entry on your outer router for every subnet you may have, seems a bit overkill
Even with NAT, you will still need a route to the destination network. If it seems like routing tables could be complex and difficult to manage, then you're starting to understand routing tables.
Is there two tables to look at if a local device in a subnet wants to communicate to the WAN such as NAT/PAT and routing tables?
The network address translation process and the routing process are separate functions in a layer 3 device. NAT may not require routing, and routing may not be associated with NATed traffic.
Depending on the direction of traffic flow, the translation may occur first, and afterwards the traffic may be evaluated to determine the proper route.
nice
So "IF" one has already been studying for the 007, should they skip watching these 008 videos?
If you're planning to take the N10-007 before it retires in June 2022, then I would highly recommend only studying from N10-007 materials.
@@chrisbowen2093 About 40% of the N10-008 includes exam objectives that are new from the N10-007. They are different enough that you would need to restart your studies if you shifted to the N10-008.
The N10-007 will be around until June 2022, so you've got plenty of time to study and pass your exam. Regardless of which exam you take, the certification you earn is identical. There's no advantage with the certification to passing the N10-008 over the N10-007.