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. With regard to Ethernet media access methods - which of the following are true?
Configure the switch so that it has lower priority than other switches in the 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.
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.
Auto - Desirable - and On

2. Which fields are included in the TCP header?
To prevent switching loops in networks with redundant switched paths.
Source Port - Acknowledgment Number - and Window
In an improperly implemented redundant topology
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.

3. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Packet switching - Packet filtering and Internetwork communication.
Path selections and Packet switching.
Decrease the window size.
Information about a route should never be sent back in the direction from which the original update came.

4. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The network layer
Information about a route should never be sent back in the direction from which the original update came.
Transport

5. 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Application
Source Port - Acknowledgment Number - and Window
Configure the switch so that it has a lower priority than other switches in the network.

6. 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
Switches increase the number of collision domains in the network.
VLAN and Swtich
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
SMTP - FTP - HTTP - and HTTPS

7. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
SMTP - FTP - HTTP - and HTTPS
All switch and bridge ports are in either the forwarding or blocking state.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Information about a route should never be sent back in the direction from which the original update came.

8. 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
Sequence number - Window size - and Acknowledgment number
Configure the switch so that it has lower priority than other switches in the network
Telnet and FTP
Duplex mismatch

9. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Source Port - Acknowledgment Number - and Window
Packet switching - Packet filtering and Internetwork communication.
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.
Data link

10. 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?
VLAN and Swtich
TCP
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
A hub and A repeater.

11. What is the purpose of the spanning-tree algorithm in a switched LAN?
SMTP FTP and HTTP
To allow remote management of the switch.
To prevent switching loops in networks with redundant switched paths.
Show cdp neighbor detail

12. By default - which of the following factors determines the spanning-tree path cost?
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.
It is the sum of the costs based on bandwidth
VTP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

13. 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?
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
Auto - On - and Desirable
Certkiller B > trace
It is the sum of the costs based on bandwidth

14. 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?
Encapsulations PPP and authentication CHAP
Application
The port is experiencing errors
Show cdp neighbor detail

15. 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?
An electrical pulse indicates that the collision has cleared.
VTP
The network layer
Path selections and Packet switching.

16. 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?
Network
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.
To allow remote management of the switch.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

17. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Serial0/1 is down - line protocol is down
Switches - Bridges - and Routers
All switch and bridge ports are in either the forwarding or blocking state.

18. 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
Congestion avoidance - Windowing and Buffering
802.3ab and 802.3z
Path selections and Packet switching.

19. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Application
Layer 4
Network
Encapsulations PPP and authentication CHAP

20. 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?
Application
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

21. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Fiber optic cable.
Layer 4
TCP
Serial0/1 is down - line protocol is down

22. 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?
ARP and ICMP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The system is malfunctioning.
Packet switching - Packet filtering and Internetwork communication.

23. Which of the following services use TCP?
SMTP FTP and HTTP
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

24. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Network

25. Which protocol uses TCP port 443 at layer 4?
All switch and bridge ports are in either the forwarding or blocking state.
Buffering - Cut-through - and Congestion avoidance
HTTPS
Physical Layer and Datalink Layer

26. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
It will prevent segment 1's broadcasts from getting to segment 2.
Device Identifiers - Capabilities list - Platform
VTP

27. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Sequence number - Window size - and Acknowledgment number
SMTP - FTP - HTTP - and HTTPS
Physical Layer and Datalink Layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

28. 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.)
The sequence number in the TCP header.
The network layer
Congestion avoidance - Windowing and Buffering
MAC Address and Bridge Priority

29. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
The Bridgeg ID and The bridge priority
A hub and A repeater.
HTTPS - SMTP - and TFTP
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

30. 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
VLAN and Swtich
TCP
In an improperly implemented redundant topology

31. 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?
Show arp and Show interface
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
MAC Address and Bridge Priority
It is used to prevent switching loops in networks with redundant switched routes.

32. What are two characteristics of 'store and forward' switching?
Switches - Bridges - and Routers
Application
The system is malfunctioning.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

33. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
VTP will allow switches to share VLAN configuration information
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The switch will forward the frame to a specific port

34. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Increased latency and Filtering of all frame errors

35. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
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.
HTTPS
TCP
Fiber optic cable.

36. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Serial0/1 is down - line protocol is down
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.
Network

37. 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?
Application
Encapsulations PPP and authentication CHAP
Telnet and FTP
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.

38. 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
To prevent switching loops in networks with redundant switched paths.
VLAN and Swtich
HTTPS - SMTP - and TFTP

39. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Device Identifiers - Capabilities list - Platform
A hub and A repeater.
Certkiller B > trace

40. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
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
MAC Address and Bridge Priority
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

41. 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?
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Layer 3
Telnet and FTP

42. 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 interfaces must be configured for NAT.
Switches - Bridges - and Routers
Physical Layer and Datalink Layer
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

43. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Path selections and Packet 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.
Switches increase the number of collision domains in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

44. 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?
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
802.3ab and 802.3z
Congestion avoidance - Windowing and Buffering

45. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
Layer 4
Fiber optic cable.
In an improperly implemented redundant topology

46. 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?
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
Data link
ARP and ICMP
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.

47. 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?
This is an Ethernet port operating at half duplex
Layer 3
TCP
Hosts use a logical bus topology

48. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
A broadcast address will never be the source address of a frame
The system is malfunctioning.
Network
SMTP - FTP - HTTP - and HTTPS

49. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Auto - On - and Desirable
802.1Q and ISL
Auto - Desirable - and On

50. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
VLAN and Swtich
Serial0/1 is down - line protocol is down
The system is malfunctioning.
Layer 4