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. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
Network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
ARP and ICMP
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.

2. 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)
In an improperly implemented redundant topology
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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

3. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
Fiber optic cable.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
HTTPS
SMTP FTP and HTTP

4. CDP is running between two CK devices. What information is supplied by CDP?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Device Identifiers - Capabilities list - Platform
ARP and ICMP
802.1Q and ISL

5. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
VTP will allow switches to share VLAN configuration information
It will prevent segment 1's broadcasts from getting to segment 2.
To allow remote management of the switch.
Data link

6. 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
Layer 3
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.
The network layer
MAC Address and Bridge Priority

7. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
Duplex mismatch
The system is malfunctioning.
Congestion avoidance - Windowing and Buffering
The port is experiencing errors

8. 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
Buffering - Cut-through - and Congestion avoidance
Switches increase the number of collision domains in the network.
100 meters
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

9. 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?
Hosts use a logical bus topology
Show arp and Show interface
The port is experiencing errors
Switches - Bridges - and Routers

10. 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
Physical Layer and Datalink Layer
Information about a route should never be sent back in the direction from which the original update came.
VLAN and Swtich
Increased latency and Filtering of all frame errors

11. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Data link
Certkiller B > trace
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
An electrical pulse indicates that the collision has cleared.

12. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
It operates without collisions and It provides faster data transfer
Transport
Duplex mismatch
Encapsulations PPP and authentication CHAP

13. Which three of the protocols below belong to the application layer? (Select three answer choices)
To prevent switching loops in networks with redundant switched paths.
HTTPS - SMTP - and TFTP
Path selections and Packet switching.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

14. 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?
This is an Ethernet port operating at half duplex
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
Application
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

15. 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?
Decrease the window size.
A cross-over cable
802.3ab and 802.3z
VTP

16. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
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.
Packet switching - Packet filtering and Internetwork communication.
An additional broadcast domain will be created.

17. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
The Bridgeg ID and The bridge priority
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Decrease the window size.
Switches increase the number of collision domains in the network.

18. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The system is malfunctioning.
ARP and ICMP
To prevent switching loops in networks with redundant switched paths.

19. 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?
802.1Q and ISL
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.
Layer 3
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.

20. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
STP
Data link
Auto - On - and Desirable

21. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
100 meters
STP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Network

22. 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.
HTTPS
The network layer
The port is experiencing errors

23. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
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
802.1Q and ISL
Network
An additional broadcast domain will be created.

24. Which OSI layer header contains the address of a destination host that is on another network?
It operates without collisions and It provides faster data transfer
Network
It is used to prevent switching loops in networks with redundant switched routes.
Application

25. 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?
Layer 4
Show cdp neighbor detail
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

26. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
Port security
Learning - Listening - and Forwarding
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.

27. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Decrease the window size.
Configure the switch so that it has a lower priority than other switches in the network.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Serial0/1 is down - line protocol is down

28. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
Learning - Listening - and Forwarding
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

29. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
The switch will forward the frame to a specific port
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.
Switches increase the number of collision domains in the network.
The sequence number in the TCP header.

30. 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?
The switch will forward the frame to a specific port
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
100 meters
All switch and bridge ports are in either the forwarding or blocking state.

31. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP
STP

32. 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
Layer 4
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Buffering - Cut-through - and Congestion avoidance

33. 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?
The port is experiencing errors
Hosts use a logical bus topology
Telnet and FTP
The Bridgeg ID and The bridge priority

34. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
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.
Information about a route should never be sent back in the direction from which the original update came.
The system is malfunctioning.
802.1Q and ISL

35. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
To prevent switching loops in networks with redundant switched paths.
Fiber optic cable.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Network

36. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
Switches increase the number of collision domains in the network.
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
Layer 3
SMTP FTP and HTTP

37. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The port is experiencing errors
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

38. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors
MAC Address and Bridge Priority
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.

39. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
Data link
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.
It is the sum of the costs based on bandwidth

40. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
ARP and ICMP
The switch will forward the frame to a specific port

41. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A cross-over cable
Encapsulations PPP and authentication CHAP
A broadcast address will never be the source address of a frame
VLAN and Swtich

42. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The network layer
Layer 4
Show cdp neighbor detail
Fiber optic cable.

43. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
STP
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.

44. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Application
802.3ab and 802.3z
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
HTTPS - SMTP - and TFTP

45. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
A broadcast address will never be the source address of a frame
Encapsulations PPP and authentication CHAP
Serial0/1 is down - line protocol is down

46. Which of the following correctly describe the various functions and virtues of a router?
An electrical pulse indicates that the collision has cleared.
SMTP FTP and HTTP
Packet switching - Packet filtering and Internetwork communication.
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.

47. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
The network layer
ARP and ICMP
Switches increase the number of collision domains in the network.

48. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
STP
The network layer
Telnet and FTP

49. 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
The network layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP
Switches increase the number of collision domains in the network.

50. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
VTP
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.
100 meters
Physical Layer and Datalink Layer