nerdexam
Cisco

200-101 · Question #136

Refer to the exhibit. The router has been configured with these commands: hostname Gateway interface FastEthernet 0/0 ip address 198.133.219.14 255.255.255.248 no shutdown interface FastEthernet 0/1 i

The correct answer is D. The addressing scheme allows users on the Internet to access the WWW server. E. Hosts on the LAN that is connected to FastEthernet 0/1 will not be able to access the Internet without address translation.. The router places a public WWW server on Fa0/0 and a private RFC 1918 LAN on Fa0/1, meaning Internet users can reach the server directly while LAN hosts require NAT to reach the Internet.

Implement Wide-Area Networks

Question

Refer to the exhibit. The router has been configured with these commands: hostname Gateway interface FastEthernet 0/0 ip address 198.133.219.14 255.255.255.248 no shutdown interface FastEthernet 0/1 ip address 192.168.10.254 255.255.255.0 no shutdown interface Serial 0/0 ip address 64.100.0.2 255.255.255.252 no shutdown ip route 0.0.0.0 0.0.0.0 64.100.0.1 What are the two results of this configuration? (Choose two.)

Exhibits

200-101 question #136 exhibit 1
200-101 question #136 exhibit 2
200-101 question #136 exhibit 3

Options

  • AThe default route should have a next hop address of 64.100.0.3.
  • BHosts on the LAN that is connected to FastEthernet 0/1 are using public IP addressing.
  • CThe address of the subnet segment with the WWW server will support seven more servers.
  • DThe addressing scheme allows users on the Internet to access the WWW server.
  • EHosts on the LAN that is connected to FastEthernet 0/1 will not be able to access the Internet without address translation.

How the community answered

(50 responses)
  • A
    26% (13)
  • B
    10% (5)
  • C
    4% (2)
  • D
    60% (30)

Why each option

The router places a public WWW server on Fa0/0 and a private RFC 1918 LAN on Fa0/1, meaning Internet users can reach the server directly while LAN hosts require NAT to reach the Internet.

AThe default route should have a next hop address of 64.100.0.3.

The Serial 0/0 interface is 64.100.0.2/30, whose subnet is 64.100.0.0/30 with usable hosts .1 and .2 only; 64.100.0.1 is the correct next-hop and 64.100.0.3 is the broadcast address, making .3 an invalid next-hop.

BHosts on the LAN that is connected to FastEthernet 0/1 are using public IP addressing.

The 192.168.10.0/24 range is a private address block defined in RFC 1918 and is not public IP addressing.

CThe address of the subnet segment with the WWW server will support seven more servers.

The /29 subnet on Fa0/0 (198.133.219.8/29) provides only 6 usable host addresses total; with the router occupying .14, only 5 additional addresses remain for servers, not 7.

DThe addressing scheme allows users on the Internet to access the WWW server.Correct

The Fa0/0 interface uses 198.133.219.14, which is a globally routable public IP address. Because public addresses are reachable across the Internet and the default route points traffic upstream via Serial 0/0, Internet users can access the WWW server at this address without any address translation.

EHosts on the LAN that is connected to FastEthernet 0/1 will not be able to access the Internet without address translation.Correct

The Fa0/1 LAN uses 192.168.10.0/24, an RFC 1918 private address range that Internet routers do not route. Without NAT configured on the Gateway router, return traffic from the Internet cannot reach these private hosts, so address translation is mandatory for Internet access.

Concept tested: NAT requirement for private LAN Internet connectivity

Source: https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/26704-nat-faq-00.html

Topics

#default route#NAT#public IP addressing#router configuration

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full 200-101 Practice