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. 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?
This is an Ethernet port operating at half duplex
Layer 3
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.
Path selections and Packet switching.

2. 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
Duplex mismatch
Application
ARP and ICMP
The network layer

3. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
The interfaces must be configured for NAT.
To allow remote management of the switch.
The Bridgeg ID and The bridge priority
Layer 4

4. 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?
Configure the switch so that it has lower priority than other switches in the network
Data link
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors

5. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Increased latency and Filtering of all frame errors
This is an Ethernet port operating at half duplex
802.1Q and ISL

6. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
The sequence number in the TCP header.
Port security
HTTPS

7. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
To prevent switching loops in networks with redundant switched paths.
802.1Q and ISL
Buffering - Cut-through - and Congestion avoidance
MAC Address and Bridge Priority

8. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Show cdp neighbor detail
It will prevent segment 1's broadcasts from getting to segment 2.
Source Port - Acknowledgment Number - and Window

9. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Learning - Listening - and Forwarding
Layer 3
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VTP

10. What is the purpose of the spanning-tree algorithm in a switched LAN?
It will prevent segment 1's broadcasts from getting to segment 2.
The interfaces must be configured for NAT.
To prevent switching loops in networks with redundant switched paths.
Duplex mismatch

11. 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?
Data link
The network layer
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
To allow remote management of the switch.

12. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Encapsulations PPP and authentication CHAP
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.
SMTP - FTP - HTTP - and HTTPS

13. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The interfaces must be configured for NAT.
Congestion avoidance - Windowing and Buffering
The system is malfunctioning.
Network

14. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
Configure the switch so that it has a lower priority than other switches in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Physical Layer and Datalink Layer
Congestion avoidance - Windowing and Buffering

15. 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
VTP will allow switches to share VLAN configuration information
Source Port - Acknowledgment Number - and Window
The system is malfunctioning.
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.

16. 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?
Encapsulations PPP and authentication CHAP
The network layer
100 meters
Switches - Bridges - and Routers

17. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Source Port - Acknowledgment Number - and Window
The interfaces must be configured for NAT.
Port security

18. Which of the following correctly describe the various functions and virtues of a router?
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.
Packet switching - Packet filtering and Internetwork communication.
This is an Ethernet port operating at half duplex
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

19. Which of the protocols below use TCP at the transport layer?
It operates without collisions and It provides faster data transfer
Show arp and Show interface
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.
SMTP - FTP - HTTP - and HTTPS

20. 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?
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.
Telnet and FTP
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.

21. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Physical Layer and Datalink Layer
Show arp and Show interface
Certkiller B > trace

22. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Application

23. 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.)
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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Configure the switch so that it has lower priority than other switches in the network
MAC Address and Bridge Priority

24. 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?
Data link
Layer 3
Decrease the window size.
The network layer

25. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
A broadcast address will never be the source address of a frame
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Show arp and Show interface
STP

26. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
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 uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
To prevent switching loops in networks with redundant switched paths.

27. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Physical Layer and Datalink Layer
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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

28. Which two of the following values does STP take into consideration when it elects the root bridge?
Certkiller B > trace
The Bridgeg ID and The bridge priority
The network layer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

29. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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.
VLAN and Swtich
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
TCP

30. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The sequence number in the TCP header.
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 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.

31. 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?
In an improperly implemented redundant topology
Decrease the window size.
802.1Q and ISL
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

32. 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?
VLAN and Swtich
CertK Switch(config)# ip default-gateway 192.168.1.115
Port security
Auto - On - and Desirable

33. 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
The network layer
TCP
Data link
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. 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.
Encapsulations PPP and authentication CHAP
STP
Application

35. Which OSI layer header contains the address of a destination host that is on another network?
Layer 4
A cross-over cable
Network
Congestion avoidance - Windowing and Buffering

36. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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.
A broadcast address will never be the source address of a frame
Switches - Bridges - and Routers
Network

37. 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?
VTP
The switch will forward the frame to a specific port
HTTPS
Show arp and Show interface

38. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
A hub and A repeater.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Congestion avoidance - Windowing and Buffering
Encapsulations PPP and authentication CHAP

39. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Telnet and FTP
It is the sum of the costs based on bandwidth
The network layer

40. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
VTP
Auto - On - and Desirable
Network
The port is experiencing errors

41. 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
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
The sequence number in the TCP header.

42. 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
Transport
Fiber optic cable.
VLAN and Swtich
It is the sum of the costs based on bandwidth

43. 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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44. Which protocol uses TCP port 443 at layer 4?
VTP will allow switches to share VLAN configuration information
Show cdp neighbor detail
HTTPS
The port is experiencing errors

45. Which of the following are types of flow control?
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
Buffering - Cut-through - and Congestion avoidance
An additional broadcast domain will be created.

46. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
To allow remote management of the switch.
Serial0/1 is down - line protocol is down
Auto - On - and Desirable
CertK Switch(config)# ip default-gateway 192.168.1.115

47. With regard to Ethernet media access methods - which of the following are true?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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 - Bridges - and Routers
HTTPS - SMTP - and TFTP

48. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
HTTPS - SMTP - and TFTP
It will prevent segment 1's broadcasts from getting to segment 2.
Encapsulations PPP and authentication CHAP
CertK Switch(config)# ip default-gateway 192.168.1.115

49. 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?
HTTPS
In an improperly implemented redundant topology
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Application

50. Which fields are included in the TCP header?
Show arp and Show interface
Switches increase the number of collision domains in the network.
Learning - Listening - and Forwarding
Source Port - Acknowledgment Number - and Window