1. In the graphic, Host A has reached 50% completion in sending a 1 KB Ethernet frame to Host D when Host B wishes to transmit its own frame to Host C. What must Host B do?

• Host B can transmit immediately since it is connected on its own cable segment.
• Host B must wait to receive a CSMA transmission from the hub, to signal its turn.
• Host B must send a request signal to Host A by transmitting an interframe gap.
• Host B must wait until it is certain that Host A has completed sending its frame.

2. Ethernet operates at which layers of the OSI model? (Choose two.)

• Network layer
• Transport layer
• Physical layer
• Application layer
• Session layer
• Data-link layer

3. Which of the following describe interframe spacing? (Choose two.)

• the minimum interval, measured in bit-times, that any station must wait before sending another frame
• the maximum interval, measured in bit-times, that any station must wait before sending another frame
• the 96-bit payload padding inserted into a frame to achieve a legal frame size
• the 96-bit frame padding transmitted between frames to achieve proper synchronization
• the time allowed for slow stations to process a frame and prepare for the next frame
• the maximum interval within which a station must send another frame to avoid being considered unreachable

4. What three primary functions does data link layer encapsulation provide? (Choose three.)

• addressing
• error detection
• frame delimiting
• port identification
• path determination
• IP address resolution

5. When a collision occurs in a network using CSMA/CD, how do hosts with data to transmit respond after the backoff period has expired?

• The hosts return to a listen-before-transmit mode.
• The hosts creating the collision have priority to send data.
• The hosts creating the collision retransmit the last 16 frames.
• The hosts extend their delay period to allow for rapid transmission.

6. What are three functions of the upper data link sublayer in the OSI model? (Choose three.)

• recognizes streams of bits
• identifies the network layer protocol
• makes the connection with the upper layers identifies the source and destination applications
• insulates network layer protocols from changes in physical equipment
• determines the source of a transmission when multiple devices are transmitting

7. What does the IEEE 802.2 standard represent in Ethernet technologies?

• MAC sublayer
• Physical layer
• Logical Link
• Control sublayer
• Network layer

8. Why do hosts on an Ethernet segment that experience a collision use a random delay before attempting to transmit a frame?

• A random delay is used to ensure a collision-free link.
• A random delay value for each device is assigned by the manufacturer.
• A standard delay value could not be agreed upon among networking device vendors.
• A random delay helps prevent the stations from experiencing another collision during the transmission.

9. Refer to the exhibit. Which option correctly matches the frame field type with the contents that frame field includes?

• header field – preamble and stop frame
• data field – network layer packet
• data field – physical addressing
• trailer field – FCS and SoF

10. Host A has an IP address of 172.16.225.93 and a mask of 255.255.248.0. Host A needs to communicate with a new host whose IP is 172.16.231.78. Host A performs the ANDing operation on the destination address. What two things will occur? (Choose two.)

• Host A will change the destination IP to the IP of the nearest router and forward the packet.
• Host A will broadcast an ARP request for the MAC of its default gateway.
• A result of 172.16.225.0 will be obtained.
• Host A will broadcast an ARP request for the MAC of the destination host.
• A result of 172.16.224.0 will be obtained.
• A result of 172.16.225.255 will be obtained.

11. Which of the following is a drawback of the CSMA/CD access method?

• Collisions can decrease network performance.
• It is more complex than non-deterministic protocols.
• Deterministic media access protocols slow network performance.
• CSMA/CD LAN technologies are only available at slower speeds than other LAN technologies.

12. Ethernet operates at which layer of the TCP/IP network model?

• application
• physical
• transport
• internet
• data link
• network access

13. What is the primary purpose of ARP?

• translate URLs to IP addresses
• resolve IPv4 addresses to MAC addresses
• provide dynamic IP configuration to network devices
• convert internal private addresses to external public addresses

14. Refer to the exhibit. The switch and workstation are administratively configured for full-duplex operation. Which statement accurately reflects the operation of this link?

• No collisions will occur on this link.
• Only one of the devices can transmit at a time.
• The switch will have priority for transmitting data.
• The devices will default back to half duplex if excessive collisions occur.

15. Refer to the exhibit. Host_A is attempting to contact Server_B. Which statements correctly describe the addressing Host_A will generate in the process? (Choose two.)

• A packet with the destination IP of Router_B.
• A frame with the destination MAC address of Switch_A.
• A packet with the destination IP of Router_A.
• A frame with the destination MAC address of Router_A.
• A packet with the destination IP of Server_B.
• A frame with the destination MAC address of Server_B.

16. Which statements correctly describe MAC addresses? (Choose three.)

• dynamically assigned
• copied into RAM during system startup
• layer 3 address
• contains a 3 byte OUI
• 6 bytes long
• 32 bits long

17. Which two features make switches preferable to hubs in Ethernet-based networks? (Choose two.)

• reduction in cross-talk
• minimizing of collisions
• support for UTP cabling
• division into broadcast domains
• increase in the throughput of communications

18. What are the two most commonly used media types in Ethernet networks today? (Choose two.)

• coaxial thicknet
• copper UTP
• coaxial thinnet
• optical fiber
• shielded twisted pair

19. Convert the binary number 10111010 into its hexadecimal equivalent. Select the correct answer from the list below.

• 85
• 90
• BA
• A1
• B3
• 1C

20. After an Ethernet collision, when the backoff algorithm is invoked, which device has priority to transmit data?

• the device involved in the collision with the lowest MAC address
• the device involved in the collision with the lowest IP address
• any device in the collision domain whose backoff timer expires first
• those that began transmitting at the same time

21. Refer to the exhibit. What command was executed on a host computer to produce the results shown?

• route PRINT
• arp -a
• arp -d
• netstat
• telnet

source : nho.cc

1. Refer to the exhibit. What does the “O*E2? from the O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0 line represent?

• an internal type 2 OSPF route.
• an external OSPF route at least two hops away.
• an external OSPF route from two different sources.
• an external OSPF route that will not increment in cost.
• a default route.
• The route was distributed into OSPF from a type 2 router.

2. Refer to the exhibit. What is the cost of the route to the 10.0.0.0 network?

• 2
• 110
• 1786
• 1.544

3. What three parameters must be indentical between OSPF routers in order to form an adjacency? (Choose three.)

• area id
• K-values
• metric value
• hello interval
• network type
• interface type

4. What does OSPF use to reduce the number of exchanges of routing information in networks where large numbers of neighbors are present? (Choose two.)

• root router
• backup root router
• domain router
• backup domain router
• designated router
• backup designated router

5. What does OSPF use to calculate the cost to a destination network?

• bandwidth
• bandwidth and hop count
• bandwidth and reliability
• bandwidth, load, and reliablity

6. A fully converged five router OSPF network has been running successfully for several weeks. All configurations have been saved and no static routes are used. If one router looses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged?

• All routes for the entire network will be present.
• Routes for connected networks that are operational will be in the routing table.
• Because the SPF algorithm has not completed all calculations, no routes will be in the table.
• A summary route for all previously learned routes will automatically appear in the routing table until all LSPs have been received by the router.

7. Refer to the exhibit. Router A is correctly configured for OSPF. Which OSPF configuration statement or set of statements was entered for router B to generate the exhibited routing table?

• B(config-router)# network 192.168.1.0 0.0.0.3 area 0
• B(config-router)# network 10.16.1.0 0.0.0.224 area 0
• B(config-router)# network 10.16.1.0 255.255.255.224 area 0
• B(config-router)# network 192.168.1.0 255.255.255.255 area 0
• B(config-router)# network 10.0.0.0 255.255.255.255 area 0

8. Refer to the exhibit. Which network command or set of sommands will cause OSPF to be enabled to send and receive packets for any R1 interface in the exhibited subnets?

• R1(config-router)# network 10.0.0.0 0.0.0.0 area 0
• R1(config-router)# network 0.0.0.0 255.255.255.255 area 0
• R1(config-router)# network 10.1.0.0 0.0.0.255 area 0
• R1(config-router)# network 172.16.1.0 0.0.0.3 area 0
• R1(config-router)# network 10.0.0.0 0.0.255.255 area 0
• R1(config-router)# network 172.16.0.0 0.255.255.255 area 0

9. Refer to the exhibit. What does the “2? stand for in the router ospf 2 statement?

• The number 2 is the autonomous system number.
• The number 2 indicates the number of networks advertised by OSPF.
• The number 2 identifies this particular instance of OSPF on this router.
• The number 2 indicates the priority of the OSPF process on this router.

10. Refer to the exhibit. All routers have been configured with the interface priorities that are shown. All routers were restarted simultaneously. The results of the DR/BDR election are shown. What can be concluded about this network?

• Router C cannot win a DR election under any circumstances.
• If the link for interface 192.168.1.4 goes down, router B will become the new DR.
• The highest router ID was most likely determined via an OSPF router-id statement or statements.
• If a new router is added with a higher router ID than router D, it will become the DR.

11. Refer to the exhibit. What configuration statements would give the results that are shown in the output of the show ip protocols command?

• B(config)# int fa0/0
  B(config-if)# router-id 192.168.1.5
• B(config)# int lo0
  B(config-if)# ip address 192.168.1.5
• B(config)# router ospf 1
  B(config-router)# router-id 192.168.1.5
• B (config)# router ospf 1
  B(config-router)# ip address 192.168.1.5

12. Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network?

• 4
• 5
• 6
• 7
• 10

13. What is the default administrative distance for OSPF?

• 90
• 100
• 110
• 115
• 120

14. Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router IDs and OSPF interface priorities. Loopback interfaces are not configured and all interfaces are operational. Router D is the DR and router C is the BDR.
What happens immediately after the following commands are entered on router A?

• A(config)# interface fa0/0
• A(config-if)# ip ospf priority 255
• A will become the DR. D will become the BDR.
• A will become the DR. C will remain the BDR.
• D will remain the DR. A will become the BDR.
• D will remain the DR. C will remain the BDR.

15. Refer to the exhibit. All routers are running OSPF. What cost would JAX put in its routing table for the 10.0.0.0/24 network?

• 2
• 156
• 1564
• 1785
• 1787

16. What range of networks will be advertised in the OSPF updates by the command Router1(config-router)# network 192.168.0.0 0.0.15.255 area 100?

• 192.168.0.0/24 through 192.168.0.15/24
• 192.168.0.0/24 through 192.168.15.0/24
• 192.168.15.0/24 through 192.168.31.0/24
• 192.168.15.0/24 through 192.168.255.0/24
• 192.168.16.0/24 through 192.168.255.0/24

17. Refer to the exhibit. The network administrator wants to set the router ID of Router1 to 192.168.100.1. What steps must the administrator take to accomplish this?

• shut down the loop back interface
• use the OSPF router-id 192.168.100.1 command
• use the clear ip ospf process command
• nothing, the router-id of Router1 is already 192.168.100.1

18. Refer to the exhibit. When OSPF is operational in the exhibited network, what neighbor relationship is developed between Router1 and Router2?

• A FULL adjacency is formed.
• A 2WAY adjacency is formed.
• Router2 will become the DR and Router1 will become the BDR.
• Both routers will become DROTHERS.

19. Refer to the exhibit. Assuming that the routers have default interface OSPF priorities and no configured loopback interfaces, what two roles will router B play on each network segment? (Choose two.)

• DR for network 192.168.1.200
• BDR for network 192.168.1.200
• DROTHER on 192.168.1.200
• DR for network 192.168.1.204
• BDR for network 192.168.1.204
• DROTHER on network 192.168.1.204

20. Refer to the exhibit. Router1 and Router2 are running OSPF. The show ip ospf neighbor command reveals no neighbors. What is a possible cause?

• OSPF autonomous system IDs do not match.
• OSPF process IDs do not match.
• OSPF network types are identical.
• OSPF hello or dead timers do not match.

21. Refer to the exhibit. Which command sequence on RouterB will redistribute a gateway of last resort to the other routers in OSPF area 0?

• RouterB(config)# router ospf 10
  RouterB(config-router)# gateway-of-last-resort 172.16.6.6
  RouterB(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0/0
• RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
  RouterB(config)# router ospf 10
  RouterB(config-router)# default-information originate
• RouterB(config)# router ospf 10
  RouterB(config-router)# default-network 172.16.6.6 0.0.0.3 area 0
  RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
• RouterB(config)# ip default-route 0.0.0.0 0.0.0.0 172.16.6.6
  RouterB(config)# router ospf 10
  RouterB(config-router)# redistribute ip default-route

22. Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running OSPF on their Ethernet interfaces. Router D was just added to the network. Routers are configured with the loopback interfaces (Lo 0) that are shown in the exhibit. What happens to the OSPF DR/BDR after RouterD is added to the network?

• RouterB takes over as DR and RouterD becomes the BDR.
• RouterD becomes the BDR and RouterA remains the DR.
• RouterD becomes the DR and RouterA becomes the BDR.
• RouterC acts as the DR until the election process is complete.
• RouterD becomes the DR and RouterB remains the BDR.
• There is no change in the DR or BDR until either current DR or BDR goes down.

23. Which two statements describe the use of OSPF DR/BDR elections? (Choose two.)

• Elections are always optional.
• Elections are required in all WAN networks.
• Elections are required in point-to-point networks.
• Elections are required in broadcast multiaccess networks.
• Elections are required in non-broadcast multiaccess networks.

24. Refer to the exhibit. The routers in the exhibit are using default OSPF configuration settings to advertise all attached networks. If all of the routers start at the same time, what will be the result of the DR and BDR elections for this single area OSPF network? (Choose three.)

• HQ will be DR for 10.4.0.0/16.
• Router A will be DR for 10.4.0.0/16.
• HQ will be BDR for 10.4.0.0/16.
• Router A will be DR for 10.5.0.0/16.
• Remote will be DR for 10.5.0.0/16.
• Remote will be BDR for 10.5.0.0/16.

25. Refer to the exhibit. What must be received between neighbors to prevent the dead time that is shown in the exhibit from reaching zero?

• any traffic through the router interfaces
• routing database updates
• hello packets
• BPDU packets

source :nho.cc

1. Refer to the exhibit. What does the “O*E2″ from the “O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0″ line represent?
• an external OSPF route that will not increment in cost.

2. Refer to the exhibit. What is the cost of the route to the 10.0.0.0 network?
• 1786

3. What three parameters must be indentical between OSPF routers in order to form an adjacency? (Choose three.)
• area id
• hello interval
• network type4. What does OSPF use to reduce the number of exchanges of routing information in networks where large numbers of neighbors are present? (Choose two.)
• designated router
• backup designated router

5. What does OSPF use to calculate the cost to a destination network?
• bandwidth6. A fully converged five router OSPF network has been running successfully for several weeks. All configurations have been saved and no static routes are used. If one router looses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged?
• Routes for connected networks that are operational will be in the routing table.7. Refer to the exhibit. Router A is correctly configured for OSPF. Which OSPF configuration statement or set of statements was entered for router B to generate the exhibited routing table?
• B(config-router)# network 192.168.1.0 0.0.0.3 area 0

8. Refer to the exhibit. Which network command or set of sommands will cause OSPF to be enabled to send and receive packets for any R1 interface in the exhibited subnets?
• R1(config-router)# network 0.0.0.0 255.255.255.255 area 0

9. Refer to the exhibit. What does the “2″ stand for in the router ospf 2 statement?
• The number 2 identifies this particular instance of OSPF on this router.

10. Refer to the exhibit. All routers have been configured with the interface priorities that are shown. All routers were restarted simultaneously. The results of the DR/BDR election are shown. What can be concluded about this network?
• The highest router ID was most likely determined via an OSPF router-id statement or statements.

11. Refer to the exhibit. What configuration statements would give the results that are shown in the output of the show ip protocols command?
• B(config)# router ospf 1B(config-router)# router-id 192.168.1.5

12. Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network?
• 6

13. What is the default administrative distance for OSPF?
• 110

14. Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router IDs and OSPF interface priorities. Loopback interfaces are not configured and all interfaces are operational. Router D is the DR and router C is the BDR. What happens immediately after the following commands are entered on router A?
• A(config)# interface fa0/0
   A(config-if)# ip ospf priority 255
   D will remain the DR. C will remain the BDR.

15. Refer to the exhibit. All routers are running OSPF. What cost would JAX put in its routing table for the 10.0.0.0/24 network?
• 1787

16. What range of networks will be advertised in the OSPF updates by the command Router1(config-router)# network 192.168.0.0 0.0.15.255 area 100?
• 192.168.0.0/24 through 192.168.15.0/24

17. Refer to the exhibit. The network administrator wants to set the router ID of Router1 to 192.168.100.1. What steps must the administrator take to accomplish this?
• nothing, the router-id of Router1 is already 192.168.100.1

18. Refer to the exhibit. When OSPF is operational in the exhibited network, what neighbor relationship is developed between Router1 and Router2?
• A FULL adjacency is formed.

19. Refer to the exhibit. Assuming that the routers have default interface OSPF priorities and no configured loopback interfaces, what two roles will router B play on each network segment? (Choose two.)
• DR for network 192.168.1.200
• BDR for network 192.168.1.204

20. Refer to the exhibit. Router1 and Router2 are running OSPF. The show ip ospf neighbor command reveals no neighbors. What is a possible cause?
• OSPF hello or dead timers do not match

21. Refer to the exhibit. Which command sequence on RouterB will redistribute a gateway of last resort to the other routers in OSPF area 0?
• RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
   RouterB(config)# router ospf 10
   RouterB(config-router)# default-information originate

22. Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running OSPF on their Ethernet interfaces. Router D was just added to the network. Routers are configured with the loopback interfaces (Lo 0) that are shown in the exhibit. What happens to the OSPF DR/BDR after RouterD is added to the network?
• There is no change in the DR or BDR until either current DR or BDR goes down.

23. Which two statements describe the use of OSPF DR/BDR elections? (Choose two.)
• Elections are required in broadcast multiaccess networks.
• Elections are required in non-broadcast multiaccess networks.

24. Refer to the exhibit. The routers in the exhibit are using default OSPF configuration settings to advertise all attached networks. If all of the routers start at the same time, what will be the result of the DR and BDR elections for this single area OSPF network? (Choose three.)
• Router A will be DR for 10.4.0.0/16.
• HQ will be BDR for 10.4.0.0/16.
• Remote will be DR for 10.5.0.0/16.

25. Refer to the exhibit. What must be received between neighbors to prevent the dead time that is shown in the exhibit from reaching zero?
• hello packets

source :cisco-academy-programs.blogspot.com