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. 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?
To allow remote management of the switch.
Layer 3
SMTP - FTP - HTTP - and HTTPS
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

2. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Source Port - Acknowledgment Number - and Window
Layer 4
Buffering - Cut-through - and Congestion avoidance

3. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Path selections and Packet switching.
Buffering - Cut-through - and Congestion avoidance
Information about a route should never be sent back in the direction from which the original update came.
Transport

4. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Switches - Bridges - and Routers
Auto - Desirable - and On
The system is malfunctioning.

5. 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?
802.1Q and ISL
TCP
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.
ARP and ICMP

6. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace
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.
In an improperly implemented redundant topology

7. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Layer 4
Path selections and Packet switching.
Certkiller B > trace

8. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.
Application
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. Which of the following are types of flow control?
VLAN and Swtich
The sequence number in the TCP header.
Layer 4
Buffering - Cut-through - and Congestion avoidance

10. 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?
Device Identifiers - Capabilities list - Platform
The switch will forward the frame to a specific port
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 3

11. 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?
HTTPS - SMTP - and TFTP
The network layer
Telnet and FTP
Data link

12. 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?
Show cdp neighbor detail
MAC Address and Bridge Priority
802.1Q and ISL
Port security

13. 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.)
MAC Address and Bridge Priority
The system is malfunctioning.
Transport
Configure the switch so that it has lower priority than other switches in the network

14. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Network
Encapsulations PPP and authentication CHAP
Telnet and FTP

15. 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?
TCP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
HTTPS - SMTP - and TFTP
Switches - Bridges - and Routers

16. Which OSI layer header contains the address of a destination host that is on another network?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
TCP
Network
The sequence number in the TCP header.

17. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Hosts use a logical bus topology
It operates without collisions and It provides faster data transfer
Path selections and Packet switching.
The Bridgeg ID and The bridge priority

18. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Physical Layer and Datalink Layer
To allow remote management of the switch.
Switches increase the number of collision domains in the network.
Configure the switch so that it has lower priority than other switches in the network

19. In a switched LAN network - What is the Spanning-Tree algorithm used for?
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 system is malfunctioning.
Learning - Listening - and Forwarding
It is used to prevent switching loops in networks with redundant switched routes.

20. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
To allow remote management of the switch.
Layer 4
Packet switching - Packet filtering and Internetwork communication.
SMTP FTP and HTTP

21. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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.
Buffering - Cut-through - and Congestion avoidance
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

22. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
In an improperly implemented redundant topology
Network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

23. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Configure the switch so that it has lower priority than other switches in the network
Serial0/1 is down - line protocol is down
The system is malfunctioning.
100 meters

24. What are two characteristics of 'store and forward' switching?
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.
ARP and ICMP
Path selections and Packet switching.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

25. 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?
Buffering - Cut-through - and Congestion avoidance
The network layer
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.

26. What is the purpose of the spanning-tree algorithm in a switched LAN?
To allow remote management of the switch.
To prevent switching loops in networks with redundant switched paths.
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.

27. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
All switch and bridge ports are in either the forwarding or blocking state.
Increased latency and Filtering of all frame errors
Show arp and Show interface
It is used to prevent switching loops in networks with redundant switched routes.

28. With regard to Ethernet media access methods - which of the following are true?
CertK Switch(config)# ip default-gateway 192.168.1.115
Show cdp neighbor detail
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.
A broadcast address will never be the source address of a frame

29. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Learning - Listening - and Forwarding
The interfaces must be configured for NAT.
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.
Encapsulations PPP and authentication CHAP

30. CDP is running between two CK devices. What information is supplied by CDP?
To allow remote management of the switch.
Auto - Desirable - and On
Device Identifiers - Capabilities list - Platform
Show cdp neighbor detail

31. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Serial0/1 is down - line protocol is down
An additional broadcast domain will be created.

32. Which protocol uses TCP port 443 at layer 4?
HTTPS
To allow remote management of the switch.
The network layer
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

33. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
Encapsulations PPP and authentication CHAP
A broadcast address will never be the source address of a frame

34. 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
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.
A hub and A repeater.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.

35. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Telnet and FTP
802.1Q and ISL
STP
The Bridgeg ID and The bridge priority

36. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
Transport
The network layer
Data link
Increased latency and Filtering of all frame errors

37. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Serial0/1 is down - line protocol is down
Information about a route should never be sent back in the direction from which the original update came.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

38. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
The network layer
An electrical pulse indicates that the collision has cleared.
Application
Data link

39. 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?
Port security
Network
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

40. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
All switch and bridge ports are in either the forwarding or blocking state.
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.
To prevent switching loops in networks with redundant switched paths.

41. 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?
Certkiller B > trace
HTTPS - SMTP - and TFTP
100 meters
Hosts use a logical bus topology

42. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches increase the number of collision domains in the network.
Application
Sequence number - Window size - and Acknowledgment number

43. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
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.
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

44. Which of the following are spanning tree port states?
It operates without collisions and It provides faster data transfer
Learning - Listening - and Forwarding
SMTP - FTP - HTTP - and HTTPS
In an improperly implemented redundant topology

45. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
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
Path selections and Packet switching.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP

46. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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.
Telnet and FTP
VTP will allow switches to share VLAN configuration information
Network

47. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Decrease the window size.
802.1Q and ISL
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.
It will prevent segment 1's broadcasts from getting to segment 2.

48. 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?
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.
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.
Sequence number - Window size - and Acknowledgment number
This is an Ethernet port operating at half duplex

49. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
HTTPS - SMTP - and TFTP
Network
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

50. Which of the following can lead to the contribution of LAN traffic congestion?
A hub and A repeater.
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth