CCNA Exam Practice Questions with Complete
Answers.
"You have been asked to come up with a subnet mask that will allow all three web servers
to be on the same network while providing the maximum number of subnets. Which
network address and subnet mask meet this requirement?
A. 192.168.252.0 255.255.255.252
B. 192.168.252.8 255.255.255.248
C. 192.168.252.8 255.255.255.252
D. 192.168.252.16 255.255.255.240
E. 192.168.252.16 255.255.255.252" - Correct Answer B
"Which subnet mask would be appropriate for a network address range to be subnetted for
up to eight LANs, with each LAN containing 5 to 26 hosts?
A. 0.0.0.240
B. 255.255.255.252
C. 255.255.255.0
D. 255.255.255.224
E. 255.255.255.240" - Correct Answer D
"An administrator must assign static IP addresses to the servers in a network. For network
192.168.20.24/29, the router is assigned the first usable host address while the sales
server is given the last usable host address. Which of the following should be entered into
the IP properties box for the sales server?
A. IP address: 192.168.20.14
Subnet Mask: 255.255.255.248
Default Gateway: 192.168.20.9
B. IP address: 192.168.20.254
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.20.1
C. IP address: 192.168.20.30
Subnet Mask: 255.255.255.248
Default Gateway: 192.168.20.25
D. IP address: 192.168.20.30
Subnet Mask: 255.255.255.240
Default Gateway: 192.168.20.17
E. IP address: 192.168.20.30
Subnet Mask: 255.255.255.240
,Default Gateway: 192.168.20.25" - Correct Answer C
"You are working in a data center environment and are assigned the address range
10.188.31.0/23. You are asked to develop an IP addressing plan to allow the maximum
number of subnets with as many as 30 hosts each.Which IP address range meets these
requirements?
A. 10.188.31.0/27
B. 10.188.31.0/26
C. 10.188.31.0/29
D. 10.188.31.0/28
E. 10.188.31.0/25" - Correct Answer A
"Which two benefits are provided by using a hierarchical addressing network addressing
scheme? (Choose two)
A. reduces routing table entries
B. auto-negotiation of media rates
C. efficient utilization of MAC addresses
D. dedicated communications between devices
E. ease of management and troubleshooting" - Correct Answer A E
"The network administrator is asked to configure 113 point-to-point links. Which IP
addressing scheme best defines the address range and subnet mask that meet the
requirement and waste the fewest subnet and host addresses?
A. 10.10.0.0/18 subnetted with mask 255.255.255.252
B. 10.10.0.0/25 subnetted with mask 255.255.255.252
C. 10.10.0.0/24 subnetted with mask 255.255.255.252
D. 10.10.0.0/23 subnetted with mask 255.255.255.252
E. 10.10.0.0/16 subnetted with mask 255.255.255.252" - Correct Answer D
"Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the
correct network address?
A. 172.16.16.0
B. 172.16.24.0
C. 172.16.0.0
D. 172.16.28.0" - Correct Answer A
"A national retail chain needs to design an IP addressing scheme to support a nationwide
network. The company needs a minimum of 300 sub-networks and a maximum of 50 host
addresses per subnet. Working with only one Class B address, which of the following
subnet masks will support an appropriate addressing scheme? (Choose two)
A. 255.255.255.0
,B. 255.255.255.128
C. 255.255.252.0
D. 255.255.255.224
E. 255.255.255.192
F. 255.255.248.0" - Correct Answer B E
"The network administrator needs to address seven LANs. RIP version 1 is the only routing
protocol in use on the network and subnet 0 is not being used. What is the maximum
number of usable IP addresses that can be supported on each LAN if the organization is
using one class C address block?
A. 6
B. 8
C. 14
D. 16
E. 30
F. 32" - Correct Answer C
"Gateway of last resort is not set
192.168.25.0/30 is subnetted, 4 subnets
D 192.168.25.20 [90/2681856] via 192.168.15.5, 00:00:10, Serial0/1
D 192.168.25.16 [90/1823638] via 192.168.15.5, 00:00:50, Serial0/1
D 192.168.25.24 [90/3837233] via 192.168.15.5, 00:05:23, Serial0/1
D 192.168.25.28 [90/8127323] via 192.168.15.5, 00:06:45, Serial0/1
C 192.168.15.4/30 is directly connected, Serial0/1
C 192.168.2.0/24 is directly connected, FastEthernet0/0
Which address and mask combination a summary of the routes learned by EIGRP?
A. 192.168.25.0 255.255.255.240
B. 192.168.25.16 255.255.255.252
C. 192.168.25.0 255.255.255.252
D. 192.168.25.28 255.255.255.240
E. 192.168.25.16 255.255.255.240
F. 192.168.25.28 255.255.255.240" - Correct Answer E
"A router receives information about network 192.168.10.0/24 from multiple sources. What
will the router consider the most reliable information about the path to that network?
A. an OSPF update for network 192.168.0.0/16
B. a static router to network 192.168.10.0/24
C. a static router to network 192.168.10.0/24 with a local serial interface configured as the
next hop
D. a RIP update for network 192.168.10.0/24
E. a directly connected interface with an address of 192.168.10.254/24
F. a default route with a next hop address of 192.168.10.1" - Correct Answer E
, "A router has learned three possible routes that could be used to reach a destination
network. One route is from EIGRP and has a composite metric of 20514560. Another route
is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route
or routes will the router install in the routing table?
A. the OSPF route
B. the EIGRP route
C. the RIPv2 route
D. all three routes
E. the OSPF and RIPv2 routes" - Correct Answer B
"A router has two FastEthernet interfaces and needs to connect to four vlans in the local
network. How can you accomplish this task, using the fewest physical interfaces and
without decreasing network performance?
A. Add two more FastEthernet interfaces.
B. Add a second router to handle the vlan traffic.
C. Use a hub to connect the four vlans with a FastEthernet interface on router.
D. Implement a router-on-a-stick configuration." - Correct Answer D
"If IP routing is enabled, which two commands set the gateway of last resort to the default
gateway? (Choose two)
A. ip default-gateway 0.0.0.0
B. ip route 172.16.2.1 0.0.0.0 0.0.0.0
C. ip default-network 0.0.0.0
D. ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E. ip route 0.0.0.0 0.0.0.0 172.16.2.1" - Correct Answer C E
"Which two are advantages of static routing when compared to dynamic routing? (choose
two)
A. Security increases because only the network administrator may change the routing
tables.
B. Configuration complexity decreases as network size increases.
C. Routing updates are automatically sent to neighbors.
D. Route summarization is computed automatically by the router.
E. Routing traffic load is reduced when used in stub network links.
F. An efficient algorithm is used to build routing tables using automatic updates.
G. Routing tables adapt automatically to topology changes." - Correct Answer A E
"Which parameter can be tuned to affect the selection of a static route as a backup when a
dynamic protocol is also being used?
A. link bandwidth
Answers.
"You have been asked to come up with a subnet mask that will allow all three web servers
to be on the same network while providing the maximum number of subnets. Which
network address and subnet mask meet this requirement?
A. 192.168.252.0 255.255.255.252
B. 192.168.252.8 255.255.255.248
C. 192.168.252.8 255.255.255.252
D. 192.168.252.16 255.255.255.240
E. 192.168.252.16 255.255.255.252" - Correct Answer B
"Which subnet mask would be appropriate for a network address range to be subnetted for
up to eight LANs, with each LAN containing 5 to 26 hosts?
A. 0.0.0.240
B. 255.255.255.252
C. 255.255.255.0
D. 255.255.255.224
E. 255.255.255.240" - Correct Answer D
"An administrator must assign static IP addresses to the servers in a network. For network
192.168.20.24/29, the router is assigned the first usable host address while the sales
server is given the last usable host address. Which of the following should be entered into
the IP properties box for the sales server?
A. IP address: 192.168.20.14
Subnet Mask: 255.255.255.248
Default Gateway: 192.168.20.9
B. IP address: 192.168.20.254
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.20.1
C. IP address: 192.168.20.30
Subnet Mask: 255.255.255.248
Default Gateway: 192.168.20.25
D. IP address: 192.168.20.30
Subnet Mask: 255.255.255.240
Default Gateway: 192.168.20.17
E. IP address: 192.168.20.30
Subnet Mask: 255.255.255.240
,Default Gateway: 192.168.20.25" - Correct Answer C
"You are working in a data center environment and are assigned the address range
10.188.31.0/23. You are asked to develop an IP addressing plan to allow the maximum
number of subnets with as many as 30 hosts each.Which IP address range meets these
requirements?
A. 10.188.31.0/27
B. 10.188.31.0/26
C. 10.188.31.0/29
D. 10.188.31.0/28
E. 10.188.31.0/25" - Correct Answer A
"Which two benefits are provided by using a hierarchical addressing network addressing
scheme? (Choose two)
A. reduces routing table entries
B. auto-negotiation of media rates
C. efficient utilization of MAC addresses
D. dedicated communications between devices
E. ease of management and troubleshooting" - Correct Answer A E
"The network administrator is asked to configure 113 point-to-point links. Which IP
addressing scheme best defines the address range and subnet mask that meet the
requirement and waste the fewest subnet and host addresses?
A. 10.10.0.0/18 subnetted with mask 255.255.255.252
B. 10.10.0.0/25 subnetted with mask 255.255.255.252
C. 10.10.0.0/24 subnetted with mask 255.255.255.252
D. 10.10.0.0/23 subnetted with mask 255.255.255.252
E. 10.10.0.0/16 subnetted with mask 255.255.255.252" - Correct Answer D
"Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the
correct network address?
A. 172.16.16.0
B. 172.16.24.0
C. 172.16.0.0
D. 172.16.28.0" - Correct Answer A
"A national retail chain needs to design an IP addressing scheme to support a nationwide
network. The company needs a minimum of 300 sub-networks and a maximum of 50 host
addresses per subnet. Working with only one Class B address, which of the following
subnet masks will support an appropriate addressing scheme? (Choose two)
A. 255.255.255.0
,B. 255.255.255.128
C. 255.255.252.0
D. 255.255.255.224
E. 255.255.255.192
F. 255.255.248.0" - Correct Answer B E
"The network administrator needs to address seven LANs. RIP version 1 is the only routing
protocol in use on the network and subnet 0 is not being used. What is the maximum
number of usable IP addresses that can be supported on each LAN if the organization is
using one class C address block?
A. 6
B. 8
C. 14
D. 16
E. 30
F. 32" - Correct Answer C
"Gateway of last resort is not set
192.168.25.0/30 is subnetted, 4 subnets
D 192.168.25.20 [90/2681856] via 192.168.15.5, 00:00:10, Serial0/1
D 192.168.25.16 [90/1823638] via 192.168.15.5, 00:00:50, Serial0/1
D 192.168.25.24 [90/3837233] via 192.168.15.5, 00:05:23, Serial0/1
D 192.168.25.28 [90/8127323] via 192.168.15.5, 00:06:45, Serial0/1
C 192.168.15.4/30 is directly connected, Serial0/1
C 192.168.2.0/24 is directly connected, FastEthernet0/0
Which address and mask combination a summary of the routes learned by EIGRP?
A. 192.168.25.0 255.255.255.240
B. 192.168.25.16 255.255.255.252
C. 192.168.25.0 255.255.255.252
D. 192.168.25.28 255.255.255.240
E. 192.168.25.16 255.255.255.240
F. 192.168.25.28 255.255.255.240" - Correct Answer E
"A router receives information about network 192.168.10.0/24 from multiple sources. What
will the router consider the most reliable information about the path to that network?
A. an OSPF update for network 192.168.0.0/16
B. a static router to network 192.168.10.0/24
C. a static router to network 192.168.10.0/24 with a local serial interface configured as the
next hop
D. a RIP update for network 192.168.10.0/24
E. a directly connected interface with an address of 192.168.10.254/24
F. a default route with a next hop address of 192.168.10.1" - Correct Answer E
, "A router has learned three possible routes that could be used to reach a destination
network. One route is from EIGRP and has a composite metric of 20514560. Another route
is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route
or routes will the router install in the routing table?
A. the OSPF route
B. the EIGRP route
C. the RIPv2 route
D. all three routes
E. the OSPF and RIPv2 routes" - Correct Answer B
"A router has two FastEthernet interfaces and needs to connect to four vlans in the local
network. How can you accomplish this task, using the fewest physical interfaces and
without decreasing network performance?
A. Add two more FastEthernet interfaces.
B. Add a second router to handle the vlan traffic.
C. Use a hub to connect the four vlans with a FastEthernet interface on router.
D. Implement a router-on-a-stick configuration." - Correct Answer D
"If IP routing is enabled, which two commands set the gateway of last resort to the default
gateway? (Choose two)
A. ip default-gateway 0.0.0.0
B. ip route 172.16.2.1 0.0.0.0 0.0.0.0
C. ip default-network 0.0.0.0
D. ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E. ip route 0.0.0.0 0.0.0.0 172.16.2.1" - Correct Answer C E
"Which two are advantages of static routing when compared to dynamic routing? (choose
two)
A. Security increases because only the network administrator may change the routing
tables.
B. Configuration complexity decreases as network size increases.
C. Routing updates are automatically sent to neighbors.
D. Route summarization is computed automatically by the router.
E. Routing traffic load is reduced when used in stub network links.
F. An efficient algorithm is used to build routing tables using automatic updates.
G. Routing tables adapt automatically to topology changes." - Correct Answer A E
"Which parameter can be tuned to affect the selection of a static route as a backup when a
dynamic protocol is also being used?
A. link bandwidth
