Test your basic knowledge |

CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
802.3ab and 802.3z
It is the sum of the costs based on bandwidth
A cross-over cable
Path selections and Packet switching.

2. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
Increased latency and Filtering of all frame errors
The network layer
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.

3. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
Switches increase the number of collision domains in the network.
Sequence number - Window size - and Acknowledgment number
The switch will forward the frame to a specific port
Congestion avoidance - Windowing and Buffering

4. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
To allow remote management of the switch.
Encapsulations PPP and authentication CHAP
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
VTP will allow switches to share VLAN configuration information

5. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
Packet switching - Packet filtering and Internetwork communication.
Data link
Duplex mismatch

6. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
Layer 3
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
Show arp and Show interface
Fiber optic cable.

7. Which of the following can lead to the contribution of LAN traffic congestion?
Telnet and FTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

8. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
An electrical pulse indicates that the collision has cleared.
Information about a route should never be sent back in the direction from which the original update came.
HTTPS

9. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Configure the switch so that it has lower priority than other switches in the network
Layer 4
STP
The network layer

10. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
Increased latency and Filtering of all frame errors
Physical Layer and Datalink Layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The port is experiencing errors

11. Which two of the following values does STP take into consideration when it elects the root bridge?
Source Port - Acknowledgment Number - and Window
The Bridgeg ID and The bridge priority
SMTP FTP and HTTP
Application

12. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Data link
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

13. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Layer 3
Fiber optic cable.
Switches increase the number of collision domains in the network.

14. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
It is the sum of the costs based on bandwidth
Switches increase the number of collision domains in the network.
CertK Switch(config)# ip default-gateway 192.168.1.115
Auto - On - and Desirable

15. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
The network layer
Transport
TCP
Switches increase the number of collision domains in the network.

16. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
Encapsulations PPP and authentication CHAP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A broadcast address will never be the source address of a frame

17. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
An additional broadcast domain will be created.
It is the sum of the costs based on bandwidth
A hub and A repeater.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

18. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
Data link
To prevent switching loops in networks with redundant switched paths.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.

19. What is the IEEE standard associated with Gigabit Ethernet?
An electrical pulse indicates that the collision has cleared.
Hosts use a logical bus topology
802.3ab and 802.3z
Application

20. Which of the protocols below use TCP at the transport layer?
Telnet and FTP
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
SMTP - FTP - HTTP - and HTTPS
HTTPS

21. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
This is an Ethernet port operating at half duplex
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A broadcast address will never be the source address of a frame

22. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
Switches increase the number of collision domains in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
CertK Switch(config)# ip default-gateway 192.168.1.115

23. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Duplex mismatch
Layer 3
Device Identifiers - Capabilities list - Platform
This is an Ethernet port operating at half duplex

24. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show arp and Show interface
Auto - Desirable - and On

25. Which of the following are true of Ethernet technology?
ARP and ICMP
Hosts use a logical bus topology
An additional broadcast domain will be created.
Duplex mismatch

26. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
Buffering - Cut-through - and Congestion avoidance
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An electrical pulse indicates that the collision has cleared.
Telnet and FTP

27. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
100 meters
Configure the switch so that it has a lower priority than other switches in the network.
802.3ab and 802.3z

28. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Decrease the window size.
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
Encapsulations PPP and authentication CHAP

29. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
In an improperly implemented redundant topology
Application

30. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Serial0/1 is down - line protocol is down
Hosts use a logical bus topology
HTTPS

31. As the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
All switch and bridge ports are in either the forwarding or blocking state.
To prevent switching loops in networks with redundant switched paths.
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
The switch will forward the frame to a specific port

32. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
SMTP - FTP - HTTP - and HTTPS
Network
The network layer

33. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
VTP
Show cdp neighbor detail
Decrease the window size.
The switch will forward the frame to a specific port

34. Which protocol uses TCP port 443 at layer 4?
HTTPS
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
STP

35. Which of the following are types of flow control?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Congestion avoidance - Windowing and Buffering

36. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
VTP
Transport
Encapsulations PPP and authentication CHAP
Configure the switch so that it has a lower priority than other switches in the network.

37. With regard to Ethernet media access methods - which of the following are true?
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

38. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
100 meters
Source Port - Acknowledgment Number - and Window
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

39. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
VTP
Duplex mismatch

40. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
STP
Switches increase the number of collision domains in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.

41. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
Hosts use a logical bus topology
Congestion avoidance - Windowing and Buffering
The network layer
VLAN and Swtich

42. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
The switch will forward the frame to a specific port
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
All switch and bridge ports are in either the forwarding or blocking state.
VLAN and Swtich

43. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Telnet and FTP
A cross-over cable

44. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
The network layer
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Network
Duplex mismatch

45. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The interfaces must be configured for NAT.
Application
Serial0/1 is down - line protocol is down

46. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
The interfaces must be configured for NAT.
Auto - Desirable - and On
Network

47. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
In an improperly implemented redundant topology
HTTPS
VTP will allow switches to share VLAN configuration information

48. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Fiber optic cable.
Telnet and FTP
The switch will forward the frame to a specific port

49. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
The network layer
An electrical pulse indicates that the collision has cleared.
Show cdp neighbor detail
The Bridgeg ID and The bridge priority

50. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
CertK Switch(config)# ip default-gateway 192.168.1.115
Layer 3
Buffering - Cut-through - and Congestion avoidance
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.