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. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Serial0/1 is down - line protocol is down
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

2. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
To prevent switching loops in networks with redundant switched paths.
CertK Switch(config)# ip default-gateway 192.168.1.115
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

3. 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?
Duplex mismatch
The interfaces must be configured for NAT.
Information about a route should never be sent back in the direction from which the original update came.
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

4. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
It is the sum of the costs based on bandwidth
Telnet and FTP
The interfaces must be configured for NAT.

5. 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 sequence number in the TCP header.
Show cdp neighbor detail
The network layer
Data link

6. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Fiber optic cable.
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.
This is an Ethernet port operating at half duplex

7. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
It will prevent segment 1's broadcasts from getting to segment 2.
Auto - Desirable - and On
Information about a route should never be sent back in the direction from which the original update came.
Serial0/1 is down - line protocol is down

8. Which of the following correctly describe steps in the OSI date encapsulation process?
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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
SMTP FTP and HTTP
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.

9. 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?
The switch will forward the frame to a specific port
HTTPS
The system is malfunctioning.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

10. Which of the following devices can the Certkiller network administrator use to segment the LAN?
An electrical pulse indicates that the collision has cleared.
Telnet and FTP
Switches - Bridges - and Routers
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

11. 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
An additional broadcast domain will be created.
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
It is used to prevent switching loops in networks with redundant switched routes.

12. 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?
Certkiller B > trace
802.3ab and 802.3z
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.

13. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Encapsulations PPP and authentication CHAP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
All switch and bridge ports are in either the forwarding or blocking state.
Configure the switch so that it has a lower priority than other switches in the network.

14. Which of the following can lead to the contribution of LAN traffic congestion?
It will prevent segment 1's broadcasts from getting to segment 2.
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.
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

15. Which fields are included in the TCP header?
Layer 4
Decrease the window size.
Source Port - Acknowledgment Number - and Window
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.

16. Which protocol uses TCP port 443 at layer 4?
MAC Address and Bridge Priority
HTTPS - SMTP - and TFTP
Learning - Listening - and Forwarding
HTTPS

17. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Sequence number - Window size - and Acknowledgment number
Auto - On - and Desirable
Serial0/1 is down - line protocol is down
Certkiller B > trace

18. 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?
ARP and ICMP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Data link
Telnet and FTP

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?
Encapsulations PPP and authentication CHAP
Layer 3
Hosts use a logical bus topology
It operates without collisions and It provides faster data transfer

20. What is the IEEE standard associated with Gigabit Ethernet?
SMTP FTP and HTTP
This is an Ethernet port operating at half duplex
SMTP - FTP - HTTP - and HTTPS
802.3ab and 802.3z

21. 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?
Information about a route should never be sent back in the direction from which the original update came.
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
100 meters

22. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
VTP will allow switches to share VLAN configuration information
MAC Address and Bridge Priority
The port is experiencing errors
Duplex mismatch

23. 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?
Certkiller B > trace
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A hub and A repeater.

24. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
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.
To allow remote management of the switch.
An electrical pulse indicates that the collision has cleared.

25. 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?
The sequence number in the TCP header.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
To allow remote management of the switch.
Physical Layer and Datalink Layer

26. 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?
Configure the switch so that it has lower priority than other switches in the network
Sequence number - Window size - and Acknowledgment number
Buffering - Cut-through - and Congestion avoidance
Layer 3

27. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
This is an Ethernet port operating at half duplex
Fiber optic cable.
Information about a route should never be sent back in the direction from which the original update came.
Layer 3

28. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Port security
MAC Address and Bridge Priority
100 meters

29. Which of the protocols below use TCP at the transport layer?
Fiber optic cable.
MAC Address and Bridge Priority
Encapsulations PPP and authentication CHAP
SMTP - FTP - HTTP - and HTTPS

30. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The switch will forward the frame to a specific port
VTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

31. 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?
VLAN and Swtich
Switches - Bridges - and Routers
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.
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.

32. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Network
Device Identifiers - Capabilities list - Platform
Show arp and Show interface

33. 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
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
Port security
Transport
VLAN and Swtich

34. 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?
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
Duplex mismatch
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115

35. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
ARP and ICMP
This is an Ethernet port operating at half duplex
The interfaces must be configured for NAT.

36. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Encapsulations PPP and authentication CHAP
The system is malfunctioning.
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

37. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
CertK Switch(config)# ip default-gateway 192.168.1.115
To allow remote management of the switch.
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
Hosts use a logical bus topology

38. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Show arp and Show interface
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
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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

39. 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?
Show arp and Show interface
Congestion avoidance - Windowing and Buffering
Path selections and Packet switching.
Learning - Listening - and Forwarding

40. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
802.1Q and ISL
HTTPS - SMTP - and TFTP
Transport
Serial0/1 is down - line protocol is down

41. 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?
Decrease the window size.
Application
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
802.3ab and 802.3z

42. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
In an improperly implemented redundant topology
802.1Q and ISL
The switch will forward the frame to a specific port
It operates without collisions and It provides faster data transfer

43. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
VTP will allow switches to share VLAN configuration information
Switches increase the number of collision domains in the network.
802.1Q and ISL

44. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
VLAN and Swtich
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Transport
It operates without collisions and It provides faster data transfer

45. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
It is used to prevent switching loops in networks with redundant switched routes.
The port is experiencing errors
Increased latency and Filtering of all frame errors

46. 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.
To prevent switching loops in networks with redundant switched paths.
The switch will forward the frame to a specific port

47. Which of the following are types of flow control?
The system is malfunctioning.
Application
Device Identifiers - Capabilities list - Platform
Buffering - Cut-through - and Congestion avoidance

48. By default - which of the following factors determines the spanning-tree path cost?
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 uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
It is the sum of the costs based on bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.

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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Show cdp neighbor detail
A cross-over cable
Layer 3

50. 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?
An additional broadcast domain will be created.
Packet switching - Packet filtering and Internetwork communication.
Network
The switch will forward the frame to a specific port