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 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?
Congestion avoidance - Windowing and Buffering
It is the sum of the costs based on bandwidth
The system is malfunctioning.
An additional broadcast domain will be created.

2. 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
MAC Address and Bridge Priority
The interfaces must be configured for NAT.
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.
Auto - On - and Desirable

3. 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.)
Learning - Listening - and Forwarding
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.
MAC Address and Bridge Priority
Application

4. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
SMTP - FTP - HTTP - and HTTPS
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.
Layer 4

5. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
100 meters
Switches increase the number of collision domains in the network.
Show cdp neighbor detail

6. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
MAC Address and Bridge Priority
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Layer 4
Path selections and Packet switching.

7. Which of the following services use TCP?
CertK Switch(config)# ip default-gateway 192.168.1.115
SMTP FTP and HTTP
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.

8. 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 4
Network
Layer 3
To allow remote management of the switch.

9. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Congestion avoidance - Windowing and Buffering
Switches - Bridges - and Routers
The network layer
Hosts use a logical bus topology

10. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115
The network layer
The switch will forward the frame to a specific port

11. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The port is experiencing errors
The network layer
CertK Switch(config)# ip default-gateway 192.168.1.115

12. 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?
Network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.
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.

13. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
MAC Address and Bridge Priority
HTTPS - SMTP - and TFTP
The system is malfunctioning.

14. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Source Port - Acknowledgment Number - and Window
802.3ab and 802.3z
A broadcast address will never be the source address of a frame
The port is experiencing errors

15. 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?
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
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.
Show cdp neighbor detail
Network

16. 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?
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
Port security
STP

17. CDP is running between two CK devices. What information is supplied by CDP?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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
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.
Device Identifiers - Capabilities list - Platform

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?
STP
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.
Application
ARP and ICMP

19. 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
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.
VLAN and Swtich
HTTPS
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

20. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Switches - Bridges - and Routers
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
Hosts use a logical bus topology
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

21. 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
Device Identifiers - Capabilities list - Platform
To prevent switching loops in networks with redundant switched paths.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

22. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
STP
The network layer

23. Which protocol uses TCP port 443 at layer 4?
HTTPS
The network layer
The network layer
Sequence number - Window size - and Acknowledgment number

24. 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?
An electrical pulse indicates that the collision has cleared.
Switches - Bridges - and Routers
Telnet and FTP
The sequence number in the TCP header.

25. Which of the protocols below use TCP at the transport layer?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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
Hosts use a logical bus topology

26. 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?
Device Identifiers - Capabilities list - Platform
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.
Physical Layer and Datalink Layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

27. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
SMTP - FTP - HTTP - and HTTPS
Decrease the window size.
Buffering - Cut-through - and Congestion avoidance

28. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Layer 4
It operates without collisions and It provides faster data transfer
Physical Layer and Datalink Layer
The interfaces must be configured for NAT.

29. 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.
ARP and ICMP
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.
Configure the switch so that it has lower priority than other switches in the network

30. 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?
A broadcast address will never be the source address of a frame
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.
Increased latency and Filtering of all frame errors
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

31. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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
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.

32. 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?
A hub and A repeater.
Duplex mismatch
Network
SMTP - FTP - HTTP - and HTTPS

33. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
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

34. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Packet switching - Packet filtering and Internetwork communication.
Physical Layer and Datalink Layer
Increased latency and Filtering of all frame errors
Serial0/1 is down - line protocol is down

35. 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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Configure the switch so that it has lower priority than other switches in the network
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Physical Layer and Datalink Layer

36. 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 will forward the frame to a specific port
ARP and ICMP
To prevent switching loops in networks with redundant switched paths.
Show arp and Show interface

37. 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
Hosts use a logical bus topology
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The sequence number in the TCP header.
The network layer

38. What is the IEEE standard associated with Gigabit Ethernet?
To prevent switching loops in networks with redundant switched paths.
802.3ab and 802.3z
The interfaces must be configured for NAT.
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

39. What are two characteristics of 'store and forward' switching?
Buffering - Cut-through - and Congestion avoidance
Switches increase the number of collision domains in the network.
It will prevent segment 1's broadcasts from getting to segment 2.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

40. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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41. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
HTTPS - SMTP - and TFTP
Packet switching - Packet filtering and Internetwork communication.
Data link
Data link

42. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
ARP and ICMP
802.1Q and ISL
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.

43. What kind of cable should be used to establish a trunked line between two Catalyst switches?
VTP
Path selections and Packet switching.
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
A cross-over cable

44. Which OSI layer header contains the address of a destination host that is on another network?
Network
A hub and A repeater.
802.1Q and ISL
Serial0/1 is down - line protocol is down

45. 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.
HTTPS
Sequence number - Window size - and Acknowledgment number
Application
Auto - On - and Desirable

46. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
SMTP - FTP - HTTP - and HTTPS
HTTPS - SMTP - and TFTP
This is an Ethernet port operating at half duplex

47. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
VTP
The sequence number in the TCP header.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Switches increase the number of collision domains in the network.

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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Layer 3
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
It is used to prevent switching loops in networks with redundant switched routes.

49. Which of the following are true of Ethernet technology?
802.3ab and 802.3z
Hosts use a logical bus topology
The Bridgeg ID and The bridge priority
All switch and bridge ports are in either the forwarding or blocking state.

50. Which two of the following values does STP take into consideration when it elects the root bridge?
Port security
Switches increase the number of collision domains in the network.
The sequence number in the TCP header.
The Bridgeg ID and The bridge priority