Week 4 - OSPF and IP Version 6

For the IPv6 address FD00:1234:5678:9ABC:DEF1:2345:6789:ABCD, which part of the address is considered the global ID of the unique local address?

00:1234:5678

As per the command output, with how many routers is router R9 full adjacent over its Gi0/0 interface? R9# show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C Gi0/0 1 0 10.1.1.1/24 1 DROTH 2/5

2

Which of the following is the prefix for address 2000:0000:0000:0005:6000:0700:0080:0009, assuming a mask of /64?

2000:0:0:5::/64

Router R1 has an interface named Gigabit Ethernet 0/1, whose MAC address has been set to 5055.4444.3333. This interface has been configured with the ipv6 address 2000:1:1:1::/64 eui-64 subcommand. What unicast address will this interface use?

2000:1:1:1:5255:44FF:FE44:3333

Which of the following is the shortest valid abbreviation for 2000:0300:0040:0005:6000:0700:0080:0009?

2000:300:40:5:6000:700:80:9

Which of the following is the unabbreviated version of IPv6 address 2001:DB8::200:28?

2001:0DB8:0000:0000:0000:0000:0200:0028

Router R1 has an interface named Gigabit Ethernet 0/1, whose MAC address has been set to 0200.0001.000A. Which of the following commands added in R1's Gigabit Ethernet 0/1 configuration mode, gives this router's G0/1 interface a unicast IPv6 address of 2001:1:1:1:1:200:1:A with a /64 prefix length?

2001:1:1:1:1:200:1:A/64-nospace

Which of the following IPv6 addresses appears to be a global unicast address based on its first few hex digits? A. FE80::1234:56FF:FE78:9ABC B. 3123:1:3:5::1 C. FF00::5 D. FDAD::1

3123:1:3:5::1

A router has been configured with the ipv6 address 3111:1:1:1::1/64 command on its G0/1 interface and ipv6 address 3222:2:2:2::1/64 on its G0/2 interface. Both interfaces are working. Which of the following routes would you expect to see in the output of the show ipv6 route connected command?

A route for 3222:2:2:2::/64 A route for 3111:1:1:1::/64

OSPF interface configuration uses the ip ospf process-id area area-number configuration command. In which modes do you configure the following settings when using this command?

An interface's area number is configured in interface mode. The router ID is configured explicitly in router mode.

An engineer connects routers R13 and R14 to the same Ethernet LAN and configures them to use OSPFv2. Which answer describes a combination of settings that would prevent the two routers from becoming OSPF neighbors?

Both routers' OSPF process uses router ID 13.13.13.13

Which of the following routing protocols use a metric that is, by default, at least partially affected by link bandwidth?

EIGRP OSPF

Router R1 currently supports IPv4, routing packets in and out of its interfaces. R1's configuration needs to be migrated to support dual-stack operation, routing both IPv4 and IPv6. Which of the following tasks must be performed before the router can also support routing IPv6 packets?

Enable IPv6 on each interface using an ipv6 address interface subcommand Additionally enabled IPv6 routing using the ipv6 unicast-routing global command

Which of the following IPv6 addresses appears to be a unique local unicast address based on its first few hex digits? A. FF00::5 B. FE89::1234:56FF:FE78:9ABC C. 3123:1:3:5::1 D. FDAD::1

FDAD::1

Which of the following is the shortest valid abbreviation for FE80:0000:0000:0100:0000:0000:0000:0123?

FE80:0:0:100:123

Router R1 has an interface named Gigabit Ethernet 0/1, whose MAC address has been set to 0200.0001.000A. The interface is then configured with the ipv6 address 2001:1:1:1:200:FF:FE01:B/64 interface subcommand; no other ipv6 address commands are configured on the interface. Which of the following answers lists the link-local address used on the interface?

FE80::FF:FE01:A

Which of the following multicast addresses is defined as the address for sending packets to only the IPv6 routers on the local link?

FF02::2

Which of the following OSPF neighbor states is expected when the exchange of topology information is complete between two OSPF neighbors?

Full

When subnetting an IPv6 address block, an engineer shows a drawing that breaks the address structure into three pieces. Comparing this concept to a three-part IPv4 address structure, which part of the IPv6 address structure is most like the IPv4 network part of the address?

Global routing prefix

When subnetting an IPv6 address block, an engineer shows a drawing that breaks the address structure into three pieces. Assuming that all subnets use the same prefix length, which of the following answers lists the name of the field on the far right side of the address?

Interface ID

A company has a small/medium-sized network with 15 routers and 40 subnets and uses OSPFv2. Which of the following is considered an advantage of using a single-area design as opposed to a multiarea design?

It allows for simpler planning and operations

Which of the following was a short-term solution to the IPv4 address exhaustion problem?

NAT/PAT

PC1, PC2 and Router R1 all connect to the same VLAN and IPv6 subnet. PC1 wants to send its first IPv6 packet to PC2. What protocol or message will PC1 use to discover the MAC address to which PC1 should send the Ethernet frame that encapsulates this IPv6 packet?

NDP NS

Which of the following routing protocols is considered to use link-state logic?

OSPF

Which of the following interior routing protocols support VLSM?

OSPF RIPv2 EIGRP

An engineer connects routers R11 and R12 to the same Ethernet LAN and configures them to use OSPFv2. Which answers describe a combination of settings that would prevent the two routers from becoming OSPF neighbors?

R11's interface uses area 11, while R12's interface uses area 12. R11's interface uses an OSPF Hello timer value of 11 while R12's uses 12.

Router R15 has been a working part of a network that uses OSPFv2. An engineer then issues the shutdown command in OSPF configuration mode on R15. Which of the following occurs?

R15 keeps all OSPF configuration but ceases all OSPF activities (routes LSDB, neighbors).

Which of the following pieces of information does a router supply in an NDP Router Advertisement (RA) message?

Router IPv6 address IPv6 prefix(es) on the link

Routers R1 and R2, with router IDs 1.1.1.1 and 2.2.2.2, connect over an Ethernet WAN link. If using all default OSPF settings, if the WAN link initializes for both routers at the same time, which of the following answers are true?

Router R1 will dynamically discover the existence of router R2. Router R1's show ip ospf neighbor command will list R2 with a state of "FULL/DR"

Routers R1 and R2, with router IDs 1.1.1.1 and 2.2.2.2, connect over an Ethernet WAN link. The configuration uses all defaults, except giving R1 an interface priority of 11 and changing both routers to use the OSPF network type point-to-point. If the WAN link initializes for both routers at the same time, which of the following answers are true?

Router R2 will be neither the DR nor the BDR. Router R1 will dynamically discover the existence of router R2.

Two routers using OSPFv2 have become neighbors and exchanged all LSAs. As a result, Router R1 now lists some OSPF-leanred routes in its routing table. Which of the following best describes how R1 uses those recently learned LSAs to choose which IP routes to add to its IP routing table?

Run some SPF math against the LSAs to calculate the routes

An engineer migrates from a more traditional OSPFv2 configuration that uses network commands in OSPF configuration mode to instead use OSPFv2 interface configuration. Which of the following commands configures the area number assigned to an interface in this new configuration?

The ip ospf command in interface configuration mode

The command output shows two routes from the longer output of the show ipv6 route command. Which answers are true about the output? R1# show ipv6 route static ! Legend omitted for brevity S 2001:DB8:2:2::/64 [1/0] via 2001:DB8:4:4::4 S ::/0 [1/0] via Serial0/0/1, directly connected

The route to ::/0 is added because of the ipv6 route global command. The administrative distance of the route to 2001:DB8:2:2::/64 is 1

A router receives an Ethernet frame that holds an IPv6 packet. The router then makes a decision to route the packet out a serial link. Which of the following statements is true about how a router forwards an IPv6 packet?

The router discards the Ethernet data-link header and trailer of the received frame.

An engineer types the command ipv6 route 2001:DB8:8:8::/64 2001:DB8:9:9::9 129 in configuration mode of Router R1 and presses Enter. Later, a show ipv6 route command does not list any route for subnet 2001:DB8:8:8::/64. Which of the following could have caused the route to not be in the IPv6 routing table?

The router has no routes that match 2001:DB8:9:9::9

Which of the following configuration settings on a router does not influence which IPv4 route a router chooses to add to its IPv4 routing table when using OSPFv2?

delay

Which of the following network commands, following the command router ospf 1, tells this router to start using OSPF on interfaces whose IP addresses are 10.1.1.1, 10.1.100.1, and 10.1.120.1?

network 10.0.0.0 0.255.255.255 area 0

Which of the following network commands, following the command router ospf 1, tells this router to start using OSPF on interfaces whose IP addresses are 10.1.1.1, 10.1.100.1, and 10.1.120.1?

network 10.1.0.0.0.0.255.255 area 0

Which of the following commands list the OSPF neighbors off interface serial 0/0?

show ip ospf neighbor serial 0/0 show ip ospf neighbor