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. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
802.3ab and 802.3z
All switch and bridge ports are in either the forwarding or blocking state.
The system is malfunctioning.
Auto - On - and Desirable

2. 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.
SMTP FTP and HTTP
Encapsulations PPP and authentication CHAP
Show arp and Show interface

3. 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.
VTP will allow switches to share VLAN configuration information
Configure the switch so that it has a lower priority than other switches in the network.
Buffering - Cut-through - and Congestion avoidance

4. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
HTTPS - SMTP - and TFTP
VLAN and Swtich
Learning - Listening - and Forwarding

5. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Serial0/1 is down - line protocol is down
Encapsulations PPP and authentication CHAP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.

6. 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?
Physical Layer and Datalink Layer
Hosts use a logical bus topology
100 meters
It operates without collisions and It provides faster data transfer

7. 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.)
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.
The switch will forward the frame to a specific port
MAC Address and Bridge Priority

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
802.3ab and 802.3z
This is an Ethernet port operating at half duplex
Configure the switch so that it has a lower priority than other switches in the network.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

9. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Auto - On - and Desirable
The sequence number in the TCP header.
Network

10. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
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 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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Learning - Listening - and Forwarding

11. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
An additional broadcast domain will be created.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
802.1Q and ISL
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

12. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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
Path selections and Packet switching.
VTP will allow switches to share VLAN configuration information
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

13. Which of the following are spanning tree port states?
An electrical pulse indicates that the collision has cleared.
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.
Learning - Listening - and Forwarding
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.

14. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Fiber optic cable.
MAC Address and Bridge Priority

15. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
Port security
Switches increase the number of collision domains in the network.
Switches - Bridges - and Routers
Switches increase the number of collision domains in the network.

16. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Data link
Learning - Listening - and Forwarding
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

17. 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?
Network
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Congestion avoidance - Windowing and Buffering

18. 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?
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.
SMTP - FTP - HTTP - and HTTPS
CertK Switch(config)# ip default-gateway 192.168.1.115
The system is malfunctioning.

19. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
A broadcast address will never be the source address of a frame
An additional broadcast domain will be created.
In an improperly implemented redundant topology
Data link

20. 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
An electrical pulse indicates that the collision has cleared.
Source Port - Acknowledgment Number - and Window
VTP

21. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
The network layer
To prevent switching loops in networks with redundant switched paths.
Show cdp neighbor detail

22. 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
The sequence number in the TCP header.
Switches increase the number of collision domains in the network.
Fiber optic cable.
Show cdp neighbor detail

23. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Layer 4
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

24. 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?
Switches increase the number of collision domains in the network.
Transport
The port is experiencing errors
VTP will allow switches to share VLAN configuration information

25. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Device Identifiers - Capabilities list - Platform
VLAN and Swtich
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

26. 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?
In an improperly implemented redundant topology
A cross-over cable
The port is experiencing errors
ARP and ICMP

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?
It operates without collisions and It provides faster data transfer
Configure the switch so that it has a lower priority than other switches in the network.
VTP
Learning - Listening - and Forwarding

28. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Data link
Layer 4
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

29. 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?
Certkiller B > trace
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Device Identifiers - Capabilities list - Platform
Application

30. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
It is the sum of the costs based on bandwidth
A broadcast address will never be the source address of a frame
802.1Q and ISL
Increased latency and Filtering of all frame errors

31. 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.
The port is experiencing errors
Application
The system is malfunctioning.

32. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
VTP will allow switches to share VLAN configuration information
Hosts use a logical bus topology
Configure the switch so that it has a lower priority than other switches in the network.

33. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
The Bridgeg ID and The bridge priority
Configure the switch so that it has lower priority than other switches in the network
Layer 4
This is an Ethernet port operating at half duplex

34. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The Bridgeg ID and The bridge priority
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.
Path selections and Packet switching.

35. Which of the following are true of Ethernet technology?
Sequence number - Window size - and Acknowledgment number
Hosts use a logical bus topology
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
An additional broadcast domain will be created.

36. 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?
Source Port - Acknowledgment Number - and Window
SMTP - FTP - HTTP - and HTTPS
Show cdp neighbor detail
Hosts use a logical bus topology

37. 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?
Sequence number - Window size - and Acknowledgment number
A hub and A repeater.
Switches - Bridges - and Routers
100 meters

38. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
Application
Switches increase the number of collision domains in the network.
It is the sum of the costs based on bandwidth
VTP

39. 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?
To allow remote management of the switch.
The interfaces must be configured for NAT.
It is used to prevent switching loops in networks with redundant switched routes.
100 meters

40. 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?
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Data link
Layer 4

41. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Data link
802.1Q and ISL
Fiber optic cable.

42. 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?
Decrease the window size.
This is an Ethernet port operating at half duplex
HTTPS - SMTP - and TFTP
It will prevent segment 1's broadcasts from getting to segment 2.

43. Which fields are included in the TCP header?
Configure the switch so that it has a lower priority than other switches in the network.
HTTPS - SMTP - and TFTP
Application
Source Port - Acknowledgment Number - and Window

44. 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
VLAN and Swtich
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

45. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
Sequence number - Window size - and Acknowledgment number
Data link
Application
It is the sum of the costs based on bandwidth

46. 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.
Application
Hosts use a logical bus topology
The switch will forward the frame to a specific port

47. 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?
The port is experiencing errors
Layer 4
To prevent switching loops in networks with redundant switched paths.
To allow remote management of the switch.

48. 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?
Path selections and Packet switching.
Layer 4
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Auto - Desirable - and On

49. 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?
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
Layer 3
Switches increase the number of collision domains in the network.
The switch will forward the frame to a specific port

50. Which of the protocols below use TCP at the transport layer?
Congestion avoidance - Windowing and Buffering
The interfaces must be configured for NAT.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
SMTP - FTP - HTTP - and HTTPS