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 a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Layer 3
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.
Buffering - Cut-through - and Congestion avoidance
Auto - Desirable - and On

2. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
Path selections and Packet switching.
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.

3. 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?
Device Identifiers - Capabilities list - Platform
Configure the switch so that it has lower priority than other switches in the network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

4. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Certkiller B > trace
Path selections and Packet switching.

5. What is the purpose of the spanning-tree algorithm in a switched LAN?
Information about a route should never be sent back in the direction from which the original update came.
It will prevent segment 1's broadcasts from getting to segment 2.
TCP
To prevent switching loops in networks with redundant switched paths.

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
The switch will forward the frame to a specific port
ARP and ICMP
VLAN and Swtich
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.

7. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Show arp and Show interface
Physical Layer and Datalink Layer
Decrease the window size.

8. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
VTP
HTTPS - SMTP - and TFTP
Data link
The system is malfunctioning.

9. 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?
Physical Layer and Datalink Layer
Information about a route should never be sent back in the direction from which the original update came.
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.
802.1Q and ISL

10. 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
A hub and A repeater.
Packet switching - Packet filtering and Internetwork communication.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

11. 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
Transport
Duplex mismatch
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The switch will forward the frame to a specific port

12. 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?
Layer 4
Physical Layer and Datalink Layer
VTP
Layer 4

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
In an improperly implemented redundant topology
Switches increase the number of collision domains in the network.
Fiber optic cable.

14. 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
HTTPS - SMTP - and TFTP
Layer 4
A broadcast address will never be the source address of a frame

15. CDP is running between two CK devices. What information is supplied by CDP?
Auto - Desirable - and On
Data link
Device Identifiers - Capabilities list - Platform
VTP

16. 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
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
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.

17. 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?
Fiber optic cable.
Sequence number - Window size - and Acknowledgment number
A broadcast address will never be the source address of a frame
Hosts use a logical bus topology

18. 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
Transport
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.

19. 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?
An electrical pulse indicates that the collision has cleared.
STP
Application
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. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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
Network
Configure the switch so that it has lower priority than other switches in the network
802.1Q and ISL

21. 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
Encapsulations PPP and authentication CHAP
Data link
Show arp and Show interface
Certkiller B > trace

22. 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?
Network
The sequence number in the TCP header.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
An additional broadcast domain will be created.

23. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
A hub and A repeater.
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS
802.3ab and 802.3z

24. In a switched LAN network - What is the Spanning-Tree algorithm used for?
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.
Network
It is used to prevent switching loops in networks with redundant switched routes.

25. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
Configure the switch so that it has lower priority than other switches in the network
Telnet and FTP
A cross-over cable

26. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
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 broadcast address will never be the source address of a frame
Certkiller B > trace
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.

27. 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
Duplex mismatch
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
100 meters

28. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
This is an Ethernet port operating at half duplex
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 port is experiencing errors
Serial0/1 is down - line protocol is down

29. 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
MAC Address and Bridge Priority
Duplex mismatch
Fiber optic cable.
The interfaces must be configured for NAT.

30. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Configure the switch so that it has a lower priority than other switches in the network.
Data link
Switches increase the number of collision domains in the network.

31. 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.)
All switch and bridge ports are in either the forwarding or blocking state.
MAC Address and Bridge Priority
The system is malfunctioning.
Layer 4

32. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Layer 3
Network
Congestion avoidance - Windowing and Buffering

33. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Switches increase the number of collision domains in the network.
Layer 4
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

34. Which protocol uses TCP port 443 at layer 4?
HTTPS
Device Identifiers - Capabilities list - Platform
Duplex mismatch
The sequence number in the TCP header.

35. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
The port is experiencing errors
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Certkiller B > trace
802.3ab and 802.3z

36. 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?
Buffering - Cut-through - and Congestion avoidance
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.
Decrease the window size.
Layer 4

37. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
In an improperly implemented redundant topology
The network layer

38. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Duplex mismatch
Switches increase the number of collision domains in the 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
VTP will allow switches to share VLAN configuration information

39. What is the IEEE standard associated with Gigabit Ethernet?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Information about a route should never be sent back in the direction from which the original update came.
802.3ab and 802.3z
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.

40. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Telnet and FTP
STP
TCP

41. With regard to Ethernet media access methods - which of the following are true?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.

42. 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?
The interfaces must be configured for NAT.
The sequence number in the TCP header.
It operates without collisions and It provides faster data transfer
Auto - Desirable - and On

43. Which OSI layer header contains the address of a destination host that is on another network?
TCP
Switches increase the number of collision domains in the network.
HTTPS
Network

44. 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?
Telnet and FTP
Duplex mismatch
SMTP FTP and HTTP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

45. 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?
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
SMTP FTP and HTTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.

46. 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)
HTTPS - SMTP - and TFTP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
To prevent switching loops in networks with redundant switched paths.
Buffering - Cut-through - and Congestion avoidance

47. Which of the following are types of flow control?
Fiber optic cable.
It will prevent segment 1's broadcasts from getting to segment 2.
Buffering - Cut-through - and Congestion avoidance
The network layer

48. 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?
Buffering - Cut-through - and Congestion avoidance
The sequence number in the TCP header.
VLAN and Swtich
Congestion avoidance - Windowing and Buffering

49. 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 broadcast address will never be the source address of a frame
CertK Switch(config)# ip default-gateway 192.168.1.115
Duplex mismatch
Port security

50. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Show arp and Show interface
The interfaces must be configured for NAT.
Network