IT6223 Data Communications and Networking 2
(Final Q1, Q2 & Final Exam)
Question 1
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A network administrator is trying to add a new router into an established OSPF network. The networks attached to the new router do not appear in the routing tables of the other OSPF routers. Given the information in the partial configuration shown below, what configuration error is causing this problem?
Router(config)# router ospf 1
Router(config-router)# network 10.0.0.0 255.0.0.0 area 0
Question 2
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Refer to the graphic. It has been decided that PC1 should be denied access to Server. Which 2 of the following commands are required to prevent only PC1 from accessing Server1 while allowing all other traffic to flow normally?
1 – Router(config)# interface fa0/0
Router(config-if)# ip access-group 101 out
2 – Router(config)# interface fa0/0
Router(config-if)# ip access-group 101 in
3 – Router(config)# access-list 101 deny ip host 172.16.161.150 host 172.16.162.163
Router(config)# access-list 101 permit ip any any
4 – Router(config)# access-list 101 deny ip 172.16.161.150 0.0.0.255 172.16.162.163 0.0.0.0
5 – Router(config)# access-list 101 permit ip any any
Question 3
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Question 4
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The OSPF Hello protocol performs which of the following 2 tasks?
- It provides dynamic neighbor discovery.
- It detects unreachable neighbors in 90 second intervals.
- It maintains neighbor relationships.
- It negotiates correctness parameters between neighboring interfaces.
- It uses timers to elect the router with the fastest links as the designated router.
- It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
Question 5
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Question 6
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Which two statements describe the process identifier that is used in the command to configure OSPF on a router?
Router(config)# router ospf 1
- All OSPF routers in an area must have the same process ID.
- Only one process number can be used on the same router.
- Different process identifiers can be used to run multiple OSPF processes
- The process number can be any number from 1 to 65,535.
- Hello packets are sent to each neighbor to determine the processor identifier.
Question 7
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Question 8
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A network administrator needs to configure a standard ACL so that only the workstation of the administrator with the IP address 192.168.15.23 can access the virtual terminal of the main router. Which two configuration commands can achieve the task?
- Router1(config)# access-list 10 permit host 192.168.15.23
- Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.0
- Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.255
- Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.0
- Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.255
Question 9
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Question 10
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Which three features are of OSPF routing protocol?
- Converge quickly
- OSPF is a classful routing protocol
- Identify the best route by use of cost
- Before exchanging routing information, OSPF routers find out neighbors
- OSPF is a classless routing protocol
Question 1
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When a DHCP server is configured, which two IP addresses should never be assignable to hosts?
- IP address used by the interfaces
- Manually assigned address to the clients
- Designated IP address to the DHCP server
- Broadcast address on the network
- IP address leased to the LAN
- Network or subnetwork IP address (Missed)
Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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Question 7
Question 8
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When a DHCP server is configured, which two IP addresses should never be assignable to hosts?
- Designated IP address to the DHCP server
- IP address leased to the LAN
- Network or subnetwork IP address
- Manually assigned address to the clients
- IP address used by the interfaces
- Broadcast address on the network
Question 9
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Which statement is correct regarding the operation of DHCP?
Question 10
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Question 1
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Refer to the exhibit. Which two statements are true about the loopback address that is configured on RouterB?
1. It ensures that data will be forwarded by RouterB.
2. It provides stability for the OSPF process on RouterB.
3. It specifies that the router ID for RouterB should be 10.0.0.1.
4. It decreases the metric for routes that are advertised from RouterB.
5. It indicates that RouterB should be elected the DR for the LAN.
Question 2
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Question 3
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Question 4
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Question 5
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Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?
Router# show ipdhcp conflict
IP address Detection method Detection time
172.16.1.32 Ping Feb 16 1998 12:28 PM
172.16.1.64 Gratuitous ARP Feb 23 1998 08:12 AM
Question 6
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Question 7
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A network administrator needs to configure a standard ACL so that only the workstation of the administrator with the IP address 192.168.15.23 can access the virtual terminal of the main router. Which two configuration commands can achieve the task?
- Router1(config)# access-list 10 permit host 192.168.15.23
- Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.0
- Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.255
- Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.0
- Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.255
Question 8
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Question 9
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Question 10
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Question 11
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Question 12
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Question 13
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Which of the following are 3 disadvantages of using NAT?
1. Translation introduces switching path delays.
2. NAT conserves legally registered addresses.
3. NAT causes loss of end-to-end IP traceability.
4. NAT increases flexibility when connecting to the Internet.
5. Certain applications will not function with NAT enabled.
6. NAT reduces address overlap occurrence.
Question 14
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Question 15
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Question 16
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Question 17
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Question 18
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Question 19
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Which two statements describe the process identifier that is used in the command to configure OSPF on a router?
Router(config)# router ospf 1
- All OSPF routers in an area must have the same process ID.
- Only one process number can be used on the same router.
- Different process identifiers can be used to run multiple OSPF processes
- The process number can be any number from 1 to 65,535.
- Hello packets are sent to each neighbor to determine the processor identifier.
Question 20
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Question 21
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What are two benefits of using NAT?
1. NAT protects network security because private networks are not advertised.
2. NAT accelerates the routing process because no modifications are made on the packets.
3. Dynamic NAT facilitates connections from the outside of the network.
4. NAT facilitates end-to-end communication when IPsec is enable.
5. NAT eliminates the need to re-address all host that require external access.
6. NAT conserves addresses through host MAC-level multiplexing.
Question 22
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Question 23
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Refer to the exhibit. What will happen to HTTP traffic coming from the Internet that is destined for 172.12.12.10 if the traffic is processed by this ACL?
router#show access-lists |
Question 24
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Question 25
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Question 26
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Refer to the exhibit. What will happen to HTTP traffic coming from the Internet that is destined for 172.12.12.10 if the traffic is processed by this ACL?
router#show access-lists |
Question 27
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Which two statements about static NAT translations are true?
1. They are always present in the NAT table.
2. They allow connection to be initiated from the outside.
3. They can be configured with access lists, to allow two or more connections to be initiated from the outside.
4. They require no inside or outside interface markings because addresses are statically defined.
Question 28
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Question 29
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When a DHCP server is configured, which two IP addresses should never be assignable to hosts?
- Designated IP address to the DHCP server
- IP address leased to the LAN
- Network or subnetwork IP address
- Manually assigned address to the clients
- IP address used by the interfaces
- Broadcast address on the network
Question 30
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All hosts in the networks have been operational for several hours when the DHCP server goes down. What happens to the hosts that have obtained service from the DHCP server?
Question 31
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Question 32
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When a DHCP server is configured, which two IP addresses should never be assignable to hosts?
- IP address used by the interfaces
- Manually assigned address to the clients
- Designated IP address to the DHCP server
- Broadcast address on the network
- IP address leased to the LAN
- Network or subnetwork IP address (Missed)
Question 33
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Which two statements about static NAT translations are true?
1. They are always present in the NAT table.
2. They allow connection to be initiated from the outside.
3. They can be configured with access lists, to allow two or more connections to be initiated from the outside.
4. They require no inside or outside interface markings because addresses are statically defined.
Question 34
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Question 35
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Which two characteristics are shared by both standard and extended ACLs?
- Both kinds of ACLs can filter based on protocol type.
- Both can permit or deny specific services by port number.
- Both include an implicit deny as a final ACE.
- Both filter packets for a specific destination host IP address.
- Both can be created by using either a descriptive name or number.
Question 36
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Which 2 commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0?
- Router(config)#router ospf 1
- Router(config)#router ospf 0
- Router(config)#router ospf area 0
- Router(config-router)#network 192.168.16.0 0.0.0.255 area 0
- Router(config-router)#network 192.168.16.0 0.0.0.255 0
- Router(config-router)#network 192.168.16.0 255.255.255.0 area 0
Question 37
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Question 38
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Question 39
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Question 40
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Question 41
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Which 3 statements describe the routing protocol OSPF?
- It supports VLSM.
- It is used to route between autonomous systems.
- It confines network instability to one area of the network.
- It increases routing overhead on the network.
- It allows extensive control of routing updates
- It is simpler to configure than RIPv2.
Question 42
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Question 43
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Question 44
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Question 45
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Question 46
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Question 47
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Question 48
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Which of the following would be good reasons to run NAT?
- You need to connect to the Internet and your hosts don't have globally unique IP addresses.
- You change to a new ISP that requires you to renumber your network.
- You don't want any hosts connecting to the Internet.
- You require two intranets with duplicate addresses to merge.
Question 49
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Question 50
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Question 2
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Question 4
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As a network administrator, you have been instructed to prevent all traffic originating on the LAN from entering the R2 router. Which the following command would implement the access list on the interface of the R2 router?
Question 5
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Which two statements describe the process identifier that is used in the command to configure OSPF on a router?
Router(config)# router ospf 1
- All OSPF routers in an area must have the same process ID.
- Only one process number can be used on the same router.
- Different process identifiers can be used to run multiple OSPF processes
- The process number can be any number from 1 to 65,535.
- Hello packets are sent to each neighbor to determine the processor identifier.
Question 6
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Question 7
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Question 8
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Question 9
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Question 10
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Refer to the exhibit. Which two statements are true about the loopback address that is configured on RouterB?
1. It ensures that data will be forwarded by RouterB.
2. It provides stability for the OSPF process on RouterB.
3. It specifies that the router ID for RouterB should be 10.0.0.1.
4. It decreases the metric for routes that are advertised from RouterB.
5. It indicates that RouterB should be elected the DR for the LAN.
Question 11
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Which of the following 3 methods/types of NAT?
1. Static
2. IP NAT pool
3. Dynamic
4. NAT double-translation
5. Overload
Question 12
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Question 13
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Question 14
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A network associate in Genesis Aerospace Industries has configured OSPF with the command:
City(config-router)# network 192.168.12.64 0.0.0.63 area 0
After completing the configuration, the associate discovers that not all the interfaces are participating in OSPF.Which three of the interfaces shown in the exhibit will participate in OSPF according to this configuration statement?
1. FastEthernet0/0
2. FastEthernet0/1
3. Serial0/0
4. Serial0/1.104
5. Serial0/1.103
6. Serial0/1.102
Question 15
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Which 3 statements describe the routing protocol OSPF?
- It supports VLSM.
- It is used to route between autonomous systems.
- It confines network instability to one area of the network.
- It increases routing overhead on the network.
- It allows extensive control of routing updates
- It is simpler to configure than RIPv2.
Question 16
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Question 17
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Which three statements describe the routing protocol OSPF?
- It supports VLSM.
- It is used to route between autonomous systems.
- It confines network instability to one area of the network.
- It increases routing overhead on the network.
- It allows extensive control of routing updates
- It is simpler to configure than RIPv2.
Question 18
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Question 19
Question 20
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Question 21
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OSPF routing uses the concept of areas. What are the three characteristics of OSPF areas?
1. Each OSPF area requires a loopback interface to be configured
2. Areas may be assigned any number from 0 to 65535
3. Area 0 is called the backbone area
4. Hierarchical OSPF networks do not require multiple areas
5. Multiple OSPF areas must connect to area 0
6. Single area OSPF networks must be configured in area 1
Question 22
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The following access list below was applied outbound on the E0 interface connected to the 192.169.1.8/29 LAN:
access-list 135 deny tcp 192.169.1.8 0.0.0.7 eq 20 any
access-list 135 deny tcp 192.169.1.8 0.0.0.7 eq 21 any
How will the above access lists affect traffic?
Question 23
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A network administrator needs to configure a standard ACL so that only the workstation of the administrator with the IP address 192.168.15.23 can access the virtual terminal of the main router. Which two configuration commands can achieve the task?
- Router1(config)# access-list 10 permit host 192.168.15.23
- Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.0
- Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.255
- Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.0
- Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.255
Question 24
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Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?
Router# show ip dhcp conflict
IP address Detection method Detection time
172.16.1.32 Ping Feb 16 1998 12:28 PM
172.16.1.64 Gratuitous ARP Feb 23 1998 08:12 AM
Question 25
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Question 26
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Question 27
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Question 28
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Question 29
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Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?
Router# show ipdhcp conflict
IP address Detection method Detection time
172.16.1.32 Ping Feb 16 1998 12:28 PM
172.16.1.64 Gratuitous ARP Feb 23 1998 08:12 AM
Question 30
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The following configuration line was added to router R1
Access-list 101 permit ip 10.25.30.0 0.0.0.255 any
What is the effect of this access list configuration?
Question 31
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Question 32
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Question 33
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Question 34
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Question 35
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Question 36
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Which 2 commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0?
- Router(config)#router ospf 1
- Router(config)#router ospf 0
- Router(config)#router ospf area 0
- Router(config-router)#network 192.168.16.0 0.0.0.255 area 0
- Router(config-router)#network 192.168.16.0 0.0.0.255 0
- Router(config-router)#network 192.168.16.0 255.255.255.0 area 0
Question 37
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Question 38
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When a DHCP server is configured, which two IP addresses should never be assignable to hosts?
- IP address used by the interfaces
- Manually assigned address to the clients
- Designated IP address to the DHCP server
- Broadcast address on the network
- IP address leased to the LAN
- Network or subnetwork IP address (Missed)
Question 39
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Question 40
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A network administrator is trying to add a new router into an established OSPF network. The networks attached to the new router do not appear in the routing tables of the other OSPF routers. Given the information in the partial configuration shown below, what configuration error is causing this problem?
Router(config)# router ospf 1
Router(config-router)# network 10.0.0.0 255.0.0.0 area 0
Question 41
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Which statement is correct regarding the operation of DHCP?
Question 42
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Question 43
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Question 44
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Question 45
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Question 46
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What are the two main types of access control lists (ACLs)?
- Standard
- IEEE
- Extended
- Specialized
Question 47
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Question 48
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Which of the following are 3 disadvantages of using NAT?
1. Translation introduces switching path delays.
2. NAT conserves legally registered addresses.
3. NAT causes loss of end-to-end IP traceability.
4. NAT increases flexibility when connecting to the Internet.
5. Certain applications will not function with NAT enabled.
6. NAT reduces address overlap occurrence.
Question 49
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The following access list below was applied outbound on the E0 interface connected to the 192.169.1.8/29 LAN:
access-list 135 deny tcp 192.169.1.8 0.0.0.7 eq 20 any
access-list 135 deny tcp 192.169.1.8 0.0.0.7 eq 21 any
How will the above access lists affect traffic?
Question 50
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Question 1
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A network associate in Genesis Aerospace Industries has configured OSPF with the command:
City(config-router)# network 192.168.12.64 0.0.0.63 area 0
After completing the configuration, the associate discovers that not all the interfaces are participating in OSPF.Which three of the interfaces shown in the exhibit will participate in OSPF according to this configuration statement?
1. FastEthernet0/0
2. FastEthernet0/1
3. Serial0/0
4. Serial0/1.104
5. Serial0/1.103
6. Serial0/1.102
Question 2
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Question 3
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Question 5
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Question 6
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Question 7
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OSPF routing uses the concept of areas. What are the three characteristics of OSPF areas?
1. Each OSPF area requires a loopback interface to be configured
2. Areas may be assigned any number from 0 to 65535
3. Area 0 is called the backbone area
4. Hierarchical OSPF networks do not require multiple areas
5. Multiple OSPF areas must connect to area 0
6. Single area OSPF networks must be configured in area 1
Question 8
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A network administrator is trying to add a new router into an established OSPF network. The networks attached to the new router do not appear in the routing tables of the other OSPF routers. Given the information in the partial configuration shown below, what configuration error is causing this problem?
Router(config)# router ospf 1
Router(config-router)# network 10.0.0.0 255.0.0.0 area 0
Question 9
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Question 10
Question 11
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Question 12
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Question 13
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Question 14
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Question 15
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The OSPF Hello protocol performs which of the following 2 tasks?
- It provides dynamic neighbor discovery.
- It detects unreachable neighbors in 90 second intervals.
- It maintains neighbor relationships.
- It negotiates correctness parameters between neighboring interfaces.
- It uses timers to elect the router with the fastest links as the designated router.
- It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
Question 16
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Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?
Router# show ip dhcp conflict
IP address Detection method Detection time
172.16.1.32 Ping Feb 16 1998 12:28 PM
172.16.1.64 Gratuitous ARP Feb 23 1998 08:12 AM
Question 17
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The following access list below was applied outbound on the E0 interface connected to the 192.169.1.8/29 LAN:
access-list 135 deny tcp 192.169.1.8 0.0.0.7 eq 20 any
access-list 135 deny tcp 192.169.1.8 0.0.0.7 eq 21 any
How will the above access lists affect traffic?
Question 18
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Which of the following 3 methods/types of NAT?
1. Static
2. IP NAT pool
3. Dynamic
4. NAT double-translation
5. Overload
Question 19
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Which three features are of OSPF routing protocol?
- Converge quickly
- OSPF is a classful routing protocol
- Identify the best route by use of cost
- Before exchanging routing information, OSPF routers find out neighbors
- OSPF is a classless routing protocol
Question 20
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Question 21
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When a DHCP server is configured, which two IP addresses should never be assignable to hosts?
- Designated IP address to the DHCP server
- IP address leased to the LAN
- Network or subnetwork IP address
- Manually assigned address to the clients
- IP address used by the interfaces
- Broadcast address on the network
Question 22
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What are two benefits of using NAT?
1. NAT protects network security because private networks are not advertised.
2. NAT accelerates the routing process because no modifications are made on the packets.
3. Dynamic NAT facilitates connections from the outside of the network.
4. NAT facilitates end-to-end communication when IPsec is enable.
5. NAT eliminates the need to re-address all host that require external access.
6. NAT conserves addresses through host MAC-level multiplexing.