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. Which of the following services use TCP?
Device Identifiers - Capabilities list - Platform
TCP
SMTP FTP and HTTP
Auto - Desirable - and On

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

3. 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?
Buffering - Cut-through - and Congestion avoidance
HTTPS
Port security
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

4. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
VLAN and Swtich
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.
Duplex mismatch
It is the sum of the costs based on bandwidth

5. Which fields are included in the TCP header?
Data link
Source Port - Acknowledgment Number - and Window
802.3ab and 802.3z
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

6. 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?
VTP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
A hub and A repeater.

7. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To prevent switching loops in networks with redundant switched paths.
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.
Auto - On - and Desirable

8. 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
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 receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Show arp and Show interface

9. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Network
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Transport

10. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
The port is experiencing errors
Path selections and Packet switching.
VTP will allow switches to share VLAN configuration information
It is the sum of the costs based on bandwidth

11. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
VTP
SMTP - FTP - HTTP - and HTTPS
Physical Layer and Datalink Layer
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.

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?
An additional broadcast domain will be created.
Information about a route should never be sent back in the direction from which the original update came.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The port is experiencing errors

13. Which of the following are types of flow control?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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
Buffering - Cut-through - and Congestion avoidance
Learning - Listening - and Forwarding

14. 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
In an improperly implemented redundant topology
Layer 3
The sequence number in the TCP header.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

15. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Source Port - Acknowledgment Number - and Window
Encapsulations PPP and authentication CHAP
Fiber optic cable.
SMTP FTP and HTTP

16. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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.
In an improperly implemented redundant topology
All switch and bridge ports are in either the forwarding or blocking state.
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

17. 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 network layer
The switch will forward the frame to a specific port
Network
Configure the switch so that it has lower priority than other switches in the network

18. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free 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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
In an improperly implemented redundant topology
STP

19. Which of the following can lead to the contribution of LAN traffic congestion?
Data link
An additional broadcast domain will be created.
Increased latency and Filtering of all frame errors
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

20. By default - which of the following factors determines the spanning-tree path cost?
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.
It is the sum of the costs based on bandwidth
Increased latency and Filtering of all frame errors
802.1Q and ISL

21. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Auto - On - and Desirable
Serial0/1 is down - line protocol is down
Transport
It will prevent segment 1's broadcasts from getting to segment 2.

22. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
Packet switching - Packet filtering and Internetwork communication.
Device Identifiers - Capabilities list - Platform
It is the sum of the costs based on bandwidth

23. 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
Show cdp neighbor detail
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 cross-over cable
Layer 3

24. CDP is running between two CK devices. What information is supplied by CDP?
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
Device Identifiers - Capabilities list - Platform
The interfaces must be configured for NAT.
The Bridgeg ID and The bridge priority

25. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Layer 3
A broadcast address will never be the source address of a frame
Switches - Bridges - and Routers

26. Which OSI layer header contains the address of a destination host that is on another network?
Network
It operates without collisions and It provides faster data transfer
The network layer
Layer 4

27. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
CertK Switch(config)# ip default-gateway 192.168.1.115
Layer 4
Network
Switches increase the number of collision domains in the network.

28. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches increase the number of collision domains in the network.
Switches - Bridges - and Routers
It is the sum of the costs based on bandwidth
Buffering - Cut-through - and Congestion avoidance

29. With regard to Ethernet media access methods - which of the following are true?
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.
It operates without collisions and It provides faster data transfer
Information about a route should never be sent back in the direction from which the original update came.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

30. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
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.
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.

31. Which of the following are spanning tree port states?
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding
VTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

32. 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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33. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
It will prevent segment 1's broadcasts from getting to segment 2.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Network
Packet switching - Packet filtering and Internetwork communication.

34. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Layer 4
Application
802.1Q and ISL

35. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
ARP and ICMP
Switches - Bridges - and Routers
Buffering - Cut-through - and Congestion avoidance
Data link

36. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
SMTP - FTP - HTTP - and HTTPS
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

37. Which protocol uses TCP port 443 at layer 4?
Layer 4
The system is malfunctioning.
This is an Ethernet port operating at half duplex
HTTPS

38. 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?
Physical Layer and Datalink Layer
Switches increase the number of collision domains in the network.
100 meters
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.

39. Which of the following correctly describe the various functions and virtues of a router?
MAC Address and Bridge Priority
Packet switching - Packet filtering and Internetwork communication.
Information about a route should never be sent back in the direction from which the original update came.
Telnet and FTP

40. 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 interfaces must be configured for NAT.
CertK Switch(config)# ip default-gateway 192.168.1.115
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The Bridgeg ID and The bridge priority

41. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Application
Learning - Listening - and Forwarding
A cross-over cable
The Bridgeg ID and The bridge priority

42. 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?
802.3ab and 802.3z
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 4
Application

43. 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.
A hub and A repeater.
SMTP - FTP - HTTP - and HTTPS
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

44. What is the purpose of the spanning-tree algorithm in a switched LAN?
Source Port - Acknowledgment Number - and Window
To prevent switching loops in networks with redundant switched paths.
It will prevent segment 1's broadcasts from getting to segment 2.
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.

45. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.
To prevent switching loops in networks with redundant switched paths.
Configure the switch so that it has lower priority than other switches in the network

46. In a switched LAN network - What is the Spanning-Tree algorithm used for?
VTP
Duplex mismatch
Configure the switch so that it has a lower priority than other switches in the network.
It is used to prevent switching loops in networks with redundant switched routes.

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?
It is used to prevent switching loops in networks with redundant switched routes.
The network layer
To allow remote management of the switch.
Auto - On - and Desirable

48. 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
It is the sum of the costs based on bandwidth
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.
Switches - Bridges - and Routers
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

49. 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.
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.
Packet switching - Packet filtering and Internetwork communication.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

50. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
SMTP FTP and HTTP
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.
Encapsulations PPP and authentication CHAP
VTP will allow switches to share VLAN configuration information