CCNA 1 Chapter 3 Exam Answers
1. Which dynamic routing protocol was developed to interconnect different Internet service providers?
BGP*
EIGRP
OSPF
RIP
2. Which routing protocol is limited to smaller network implementations because it does not accommodate growth for larger networks?
OSPF
RIP*
EIGRP
IS-IS
3. What two tasks do dynamic routing protocols perform? (Choose two.)
discover hosts
update and maintain routing tables*
propagate host default gateways
network discovery*
assign IP addressing
4. When would it be more beneficial to use a dynamic routing protocol instead of static routing?
in an organization with a smaller network that is not expected to grow in size
on a stub network that has a single exit point
in an organization where routers suffer from performance issues
on a network where there is a lot of topology changes*
5. When would it be more beneficial to use static routing instead of dynamic routing protocols?
on a network where dynamic updates would pose a security risk*
on a network that is expected to continually grow in size
on a network that has a large amount of redundant paths
on a network that commonly experiences link failures
6. What is a purpose of the network command when configuring RIPv2 as the routing protocol?
It identifies the interfaces that belong to a specified network*
It specifies the remote network that can now be reached
It immediately advertises the specified network to neighbor routers with a classful mask
It populates the routing table with the network entry
7. A network administrator configures a static route on the edge router of a network to assign a gateway of last resort. How would a network administrator configure the edge router to automatically share this route within RIP?
Use the auto-summary command
Use the passive-interface command
Use the network command
Use the default-information originate command*
8. What is the purpose of the passive-interface command?
allows a routing protocol to forward updates out an interface that is missing its IP address
allows a router to send routing updates on an interface but not receive updates via that interface
allows an interface to remain up without receiving keepalives
allows interfaces to share IP addresses
allows a router to receive routing updates on an interface but not send updates via that interface*
9. Which route would be automatically created when a router interface is activated and configured with an IP address?
D 10.16.0.0/24 [90/3256] via 192.168.6.9
C 192.168.0.0/24 is directly connected, FastEthernet 0/0 *
S 192.168.1.0/24 is directly connected, FastEthernet 0/1
O 172.16.0.0/16 [110/65] via 192.168.5.1
10. The graphic displays the following output:
R1# show ip route | begin Gateway
Gateway of last resort is not set
192.168.10.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.10.0/24 is directly connected, GigabitEthernet0/0.10
L 192.168.10.254/32 is directly connected, GigabitEthernet0/0.10
192.168.20.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.20.0/24 is directly connected, GigabitEthernet0/0.20
L 192.168.20.254/32 is directly connected, GigabitEthernet0/0.20
O 192.168.30.0/24 [110/2] via 192.168.200.2, 00:01:20, GigabitEthernet0/1
192.168.200.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.200.0/30 is directly connected, GigabitEthernet0/1
L 192.168.200.1/32 is directly connected, GigabitEthernet0/1
Refer to the exhibit. Which two types of routes could be used to describe the 192.168.200.0/30 route? (Choose two.)
ultimate route*
level 1 parent route
level 1 network route
level 2 child route*
supernet route
11. What occurs next in the router lookup process after a router identifies a destination IP address and locates a matching level 1 parent route?
The level 2 child routes are examined*
The level 1 supernet routes are examined
The level 1 ultimate routes are examined
The router drops the packet
12. Which route would be used to forward a packet with a source IP address of 192.168.10.1 and a destination IP address of 10.1.1.1?
C 192.168.10.0/30 is directly connected, GigabitEthernet0/1
S 10.1.0.0/16 is directly connected, GigabitEthernet0/0
O 10.1.1.0/24 [110/65] via 192.168.200.2, 00:01:20, Serial0/1/0*
S* 0.0.0.0/0 [1/0] via 172.16.1.1
13. Which two requirements are used to determine if a route can be considered as an ultimate route in a router’s routing table? (Choose two.)
contain subnets
be a default route
contain an exit interface*
be a classful network entry
contain a next-hop IP address*
14. What is a disadvantage of using dynamic routing protocols?
They are only suitable for simple topologies.
Their configuration complexity increases as the size of the network grows.
They send messages about network status insecurely across networks by default.*
They require administrator intervention when the pathway of traffic changes.
15. Which two statements are true regarding classless routing protocols? (Choose two.)
sends subnet mask information in routing updates *
sends complete routing table update to all neighbors
is supported by RIP version 1
allows for use of both 192.168.1.0/30 and 192.168.1.16/28 subnets in the same topology *
reduces the amount of address space available in an organization
16. Refer to the exhibit. Based on the partial output from the show ip route command, what two facts can be determined about the RIP routing protocol? (Choose two.)
RIP version 2 is running on this router and its RIP neighbor*
The metric to the network 172.16.0.0 is 120
RIP version 1 is running on this router and its RIP neighbor
The command no auto-summary has been used on the RIP neighbor router*
RIP will advertise two networks to its neighbor
17. While configuring RIPv2 on an enterprise network, an engineer enters the command network 192.168.10.0 into router configuration mode.
What is the result of entering this command?
The interface of the 192.168.10.0 network is sending version 1 and version 2 updates
The interface of the 192.168.10.0 network is receiving version 1 and version 2 updates
The interface of the 192.168.10.0 network is sending only version 2 updates*
The interface of the 192.168.10.0 network is sending RIP hello messages
18. A destination route in the routing table is indicated with a code D. Which kind of route entry is this?
a static route
a route used as the default gateway
a network directly connected to a router interface
a route dynamically learned through the EIGRP routing protocol*
19. Refer to the exhibit. Which interface will be the exit interface to forward a data packet with the destination IP address 172.16.0.66?
Serial0/0/0
Serial0/0/1*
GigabitEthernet0/0
GigabitEthernet0/1
20. Which type of route will require a router to perform a recursive lookup?
an ultimate route that is using a next hop IP address on a router that is not using CEF*
a level 2 child route that is using an exit interface on a router that is not using CEF
a level 1 network route that is using a next hop IP address on a router that is using CEF
a parent route on a router that is using CEF
21. Which route is the best match for a packet entering a router with a destination address of 10.16.0.2?
S 10.0.0.0/8 [1/0] via 192.168.0.2
S 10.16.0.0/24 [1/0] via 192.168.0.9*
S 10.16.0.0/16 is directly connected, Ethernet 0/1
S 10.0.0.0/16 is directly connected, Ethernet 0/0
22. A router is configured to participate in multiple routing protocol: RIP, EIGRP, and OSPF. The router must send a packet to network 192.168.14.0. Which route will be used to forward the traffic?
a 192.168.14.0/26 route that is learned via RIP*
a 192.168.14.0/24 route that is learned via EIGRP
a 192.168.14.0/25 route that is learned via OSPF
a 192.168.14.0/25 route that is learned via RIP
23. What is different between IPv6 routing table entries compared to IPv4 routing table entries?
IPv6 routing tables include local route entries which IPv4 routing tables do not.
By design IPv6 is classless so all routes are effectively level 1 ultimate routes.*
The selection of IPv6 routes is based on the shortest matching prefix, unlike IPv4 route selection which is based on the longest matching prefix.
IPv6 does not use static routes to populate the routing table as used in IPv4.
24. The three components of dynamic routing protocols include:
Data structures
Routing protocol messages
Algorithm*
25. Match the characteristic to the corresponding type of routing. (Not all options are used.)
