SWRE Unit 14

What will router R1 do with a packet that has a destination IPv6 address of 2001:db8:cafe:5::1?

• • forward the packet out GigabitEthernet0/0

• • drop the packet

• • forward the packet out GigabitEthernet0/1

• • forward the packet out Serial0/0/0

Answer explanation

The route ::/0 is the compressed form of the 0000:0000:0000:0000:0000:0000:0000:0000/0 default route. The default route is used if a more specific route is not found in the routing table.

Refer to the exhibit. Currently router R1 uses an EIGRP route learned from Branch2 to reach the 10.10.0.0/16 network. Which floating static route would create a backup route to the 10.10.0.0/16 network in the event that the link between R1 and Branch2 goes down?

• • ip route 10.10.0.0 255.255.0.0 Serial 0/0/0 100

• • ip route 10.10.0.0 255.255.0.0 209.165.200.226 100

• • ip route 10.10.0.0 255.255.0.0 209.165.200.225 100

• • ip route 10.10.0.0 255.255.0.0 209.165.200.225 50

Answer explanation

A floating static route needs to have an administrative distance that is greater than the administrative distance of the active route in the routing table. Router R1 is using an EIGRP route which has an administrative distance of 90 to reach the 10.10.0.0/16 network. To be a backup route the floating static route must have an administrative distance greater than 90 and have a next hop address corresponding to the serial interface IP address of Branch1.

R1 was configured with the static route command ip route 209.165.200.224 255.255.255.224 S0/0/0 and consequently users on network 172.16.0.0/16 are unable to reach resources on the Internet. How should this static route be changed to allow user traffic from the LAN to reach the Internet?

• • Add an administrative distance of 254.

• • Change the destination network and mask to 0.0.0.0 0.0.0.0

• • Change the exit interface to S0/0/1.

• • Add the next-hop neighbor address of 209.165.200.226.

Answer explanation

The static route on R1 has been incorrectly configured with the wrong destination network and mask. The correct destination network and mask is 0.0.0.0 0.0.0.0.

Which option shows a correctly configured IPv4 default static route?

• • ip route 0.0.0.0 255.255.255.0 S0/0/0

• • ip route 0.0.0.0 0.0.0.0 S0/0/0

• • ip route 0.0.0.0 255.255.255.255 S0/0/0

• • ip route 0.0.0.0 255.0.0.0 S0/0/0

Answer explanation

The static route ip route 0.0.0.0 0.0.0.0 S0/0/0 is considered a default static route and will match all destination networks.

Which static route command can be entered on R1 to forward traffic to the LAN connected to R2?

• • ipv6 route 2001:db8:12:10::/64 S0/0/0

• • ipv6 route 2001:db8:12:10::/64 S0/0/1 fe80::2

• • ipv6 route 2001:db8:12:10::/64 S0/0/0 fe80::2

• • ipv6 route 2001:db8:12:10::/64 S0/0/1 2001:db8:12:10::1

In addition to static routes directing traffic to networks 10.10.0.0/16 and 10.20.0.0/16, Router HQ is also configured with the following command:

• • Packets that are received from the Internet will be forwarded to one of the LANs connected to R1 or R2.

• • Packets with a destination network that is not 10.10.0.0/16 or is not 10.20.0.0/16 or is not a directly connected network will be forwarded to the Internet.

• • Packets from the 10.10.0.0/16 network will be forwarded to network 10.20.0.0/16, and packets from the 10.20.0.0/16 network will be forwarded to network 10.10.0.0/16.

• • Packets that are destined for networks that are not in the routing table of HQ will be dropped.

Refer to the exhibit. Based on the exhibited configuration and output, why is VLAN 99 missing?

• • because VLAN 99 is not a valid management VLAN

• • because there is a cabling problem on VLAN 99

• • because VLAN 1 is up and there can only be one management VLAN on the switch

• • because VLAN 99 has not yet been created

Which route was configured as a static route to a specific network using the next-hop address?

• • S 10.17.2.0/24 [1/0] via 10.16.2.2

• • S 0.0.0.0/0 [1/0] via 10.16.2.2

• • S 10.17.2.0/24 is directly connected, Serial 0/0/0

• • C 10.16.2.0/24 is directly connected, Serial0/0/0

Answer explanation

The C in a routing table indicates an interface that is up and has an IP address assigned. The S in a routing table signifies that a route was installed using the ip route command. Two of the routing table entries shown are static routes to a specific destination (the 192.168.2.0 network). The entry that has the S denoting a static route and [1/0] was configured using the next-hop address. The other entry (S 192.168.2.0/24 is directly connected, Serial 0/0/0) is a static route configured using the exit interface. The entry with the 0.0.0.0 route is a default static route which is used to send packets to any destination network that is not specifically listed in the routing table.

Select the three PAgP channel establishment modes. (Choose three.)

• auto

• on

• passive

• desirable

• extended

R1 has been configured as shown. However, PC1 is not able to receive an IPv4 address. What is the problem?​

• • The ip helper-address command was applied on the wrong interface.

• • R1 is not configured as a DHCPv4 server.​

• • A DHCP server must be installed on the same LAN as the host that is receiving the IP address.

• • The ip address dhcp command was not issued on the interface Gi0/1.

Answer explanation

The ip helper-address command has to be applied on interface Gi0/0. This command must be present on the interface of the LAN that contains the DHCPv4 client PC1 and must be directed to the correct DHCPv4 server.