Exam 300-410 topic 1 question 233 discussion

I think we are missing some info in the question to correctly answer this one. A. R2(config)#interface Tunnel1 R2(config-if)#ip address 172.20.1.2 255.255.255.0 R2(config-if)#ip mtu 1400 R2(config-if)#ip tcp adjust-mss 1360 R2(config-if)#tunnel source 192.168.20.1 R2(config-if)#tunnel destination 192.168.10.1 B. R2(config)#interface Tunnel1 R2(config-if#ip address 172.20.1.2 255.255.255.0 R2(config-if)#ip mtu 1400 R2(config-if)#ip tcp adjust-mss 1360 R2(config-if)#tunnel source 10.10.2.2 R2(config-if)#tunnel destination 10.10.1.1 C. R2(config)#interface Tunnel1 R2(config-if)#ip address 172.20.1.2 255.255.255.0 R2(config-if)#ip mtu 1500 R2(config-if)#ip tcp adjust-mss 1360 R2(config-if)#tunnel source 10.10.2.2 R2(config-if)#tunnel destination 10.10.1.1 D. R2(config)#interface Tunnel1 R2(config-if)#ip address 172.20.1.2 255.255.255.0 R2(config-if)#ip mtu 1500 R2(config-if)#ip tcp adjust-mss 1360 R2(config-if)#tunnel source 192.168.20.1 R2(config-if)#tunnel destination 10.10.1.1

Literary this is so idiotic. How can we make assumptions of how big is the company , so we can device if we need class A or C ? 192.168... is a classic private network and is the decision of an architect... If I see this question in the exams, I will put B . BUT if cisco , consider B wrong ONLY BECAUSE a missing parenthesis " R2(config-if#ip address 172.20.1.2 255.255.255.0 " , and they did that on purpose and not just a typo. I wish them ......

B is correct The addresses 10.10.2.2 and 10.10.1.1 are more commonly used for loopback addresses, rather than class C range.

This question is just crap! Who can know what networks is the customer using and the provider using? We can assume that the customer have a small network or is using class C networks and so the provider is using class A networks for the loopbacks. The point is that both A and B can be right it depends on which networks the ISP and the customer are using....

its B, class C is prefered

A & B setup correctly. https://community.cisco.com/t5/networking-knowledge-base/how-to-configure-a-gre-tunnel/ta-p/3131970 I "guess for this part of the question, " between two customer sites using loopback to hide internal networks", I would lean towards Class C, instead of Class A. But it's just a guess at this point.

I can´t find a better form to explain my answer other than writing it in my native language, spanish: la pregunta pide establecer un túnel GRE haciendo uso de loopbacks con el fin de ocultar las redes internas (privadas) del cliente.. la respuesta es A o B (por el ip mtu 1400).. yo digo que la respuesta no puede ser A porque establece los túneles con IP's que son clásicas de redes internas/privadas en sitios de clientes y por ende no ocultaría dicha info.. por tanto mi respuesta es B.. source y destination son IP's menos clásicas para redes internas que las IP's de la opción A.

Google: "Cisco recommends Class C addresses for small organizations with fewer than 256 hosts. For larger organizations, Cisco recommends Class A or Class B addresses. " Since this is for customer sites I choose Class A (the 10.x.x.x)

A or B? A is my answer

I think we cannot answer this Q without exhibit, the only different is with IP address.... please correct me if I'm wrong

wouldn't option A or B be correct?

https://community.cisco.com/t5/networking-knowledge-base/how-to-configure-a-gre-tunnel/ta-p/3131970

sorry option A

team for me is B, because, I prefer use Ip class "C" 192.168.1.0/24 for tunnel of gre. I think we are missing some info in the question to correctly answer this one

Agree, it's "A" or "B". tunnel source Loopback0 (or the IP) + destination is the IP of the loopback interface on the other end of the tunnel.

Agreeded, but the answer has to be A or B "IP MTU 1400"