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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. 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?
VTP will allow switches to share VLAN configuration information
It is used to prevent switching loops in networks with redundant switched routes.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
An electrical pulse indicates that the collision has cleared.

2. 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?
Increased latency and Filtering of all frame errors
Data link
The interfaces must be configured for NAT.
Network

3. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Learning - Listening - and Forwarding
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Data link

4. 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?
An additional broadcast domain will be created.
The switch will forward the frame to a specific port
Fiber optic cable.
The network layer

5. 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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6. 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.
Show cdp neighbor detail
CertK Switch(config)# ip default-gateway 192.168.1.115
Information about a route should never be sent back in the direction from which the original update came.

7. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Sequence number - Window size - and Acknowledgment number
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Auto - On - and Desirable
It operates without collisions and It provides faster data transfer

8. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Port security
Show arp and Show interface
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Auto - Desirable - and On

9. Which of the following are types of flow control?
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.
Buffering - Cut-through - and Congestion avoidance
SMTP - FTP - HTTP - and HTTPS
Application

10. 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?
Network
Show cdp neighbor detail
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Physical Layer and Datalink Layer

11. 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 switch will forward the frame to a specific port
Auto - Desirable - and On
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
To prevent switching loops in networks with redundant switched paths.

12. 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)
Show cdp neighbor detail
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
An additional broadcast domain will be created.
Decrease the window size.

13. 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
MAC Address and Bridge Priority
A hub and A repeater.
The system is malfunctioning.

14. 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?
Source Port - Acknowledgment Number - and Window
Fiber optic cable.
Increased latency and Filtering of all frame errors
Port security

15. What are two characteristics of 'store and forward' switching?
SMTP - FTP - HTTP - and HTTPS
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP will allow switches to share VLAN configuration information

16. Which fields are included in the TCP header?
Data link
This is an Ethernet port operating at half duplex
Source Port - Acknowledgment Number - and Window
An additional broadcast domain will be created.

17. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
HTTPS
Learning - Listening - and Forwarding
VTP
STP

18. 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
The sequence number in the TCP header.
MAC Address and Bridge Priority
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

19. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
SMTP FTP and HTTP
TCP
The port is experiencing errors

20. CDP is running between two CK devices. What information is supplied by CDP?
A broadcast address will never be the source address of a frame
802.1Q and ISL
Device Identifiers - Capabilities list - Platform
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

21. 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
The network layer
Duplex mismatch
Switches increase the number of collision domains in the network.
A broadcast address will never be the source address of a frame

22. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Increased latency and Filtering of all frame errors
Port security
Sequence number - Window size - and Acknowledgment number
VTP will allow switches to share VLAN configuration information

23. Which of the following are true of Ethernet technology?
The network layer
Hosts use a logical bus topology
Data link
The sequence number in the TCP header.

24. 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?
A cross-over cable
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.
ARP and ICMP

25. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
A hub and A repeater.
Transport
The system is malfunctioning.
Path selections and Packet switching.

26. 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?
SMTP - FTP - HTTP - and 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
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.
To prevent switching loops in networks with redundant switched paths.

27. 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?
MAC Address and Bridge Priority
VTP
In an improperly implemented redundant topology
STP

28. 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
Fiber optic cable.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show cdp neighbor detail
Application

29. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Auto - Desirable - and On
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.
Configure the switch so that it has lower priority than other switches in the network
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.

30. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Device Identifiers - Capabilities list - Platform
A cross-over cable
The port is experiencing errors
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

31. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Show cdp neighbor detail
The sequence number in the TCP header.

32. 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?
Source Port - Acknowledgment Number - and Window
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
CertK Switch(config)# ip default-gateway 192.168.1.115
A hub and A repeater.

33. 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?
Data link
Certkiller B > trace
It is the sum of the costs based on bandwidth
All switch and bridge ports are in either the forwarding or blocking state.

34. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
MAC Address and Bridge Priority
CertK Switch(config)# ip default-gateway 192.168.1.115

35. Which of the following can lead to the contribution of LAN traffic congestion?
Auto - Desirable - and On
100 meters
Sequence number - Window size - and Acknowledgment number
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

36. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
An electrical pulse indicates that the collision has cleared.
VTP
Packet switching - Packet filtering and Internetwork communication.

37. Which protocol uses TCP port 443 at layer 4?
Fiber optic cable.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Serial0/1 is down - line protocol is down
HTTPS

38. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Encapsulations PPP and authentication CHAP
MAC Address and Bridge Priority
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

39. 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?
The network layer
Learning - Listening - and Forwarding
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.
Hosts use a logical bus topology

40. 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?
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.
Layer 4
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

41. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Learning - Listening - and Forwarding
This is an Ethernet port operating at half duplex
The switch will forward the frame to a specific port

42. 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
VTP will allow switches to share VLAN configuration information
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.

43. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Switches increase the number of collision domains in the network.
Switches - Bridges - and Routers
This is an Ethernet port operating at half duplex
Transport

44. Which of the following correctly describe steps in the OSI date encapsulation process?
Layer 4
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.
HTTPS - SMTP - and TFTP
Device Identifiers - Capabilities list - Platform

45. Which of the following correctly describe the various functions and virtues of a router?
Layer 4
Packet switching - Packet filtering and Internetwork communication.
It will prevent segment 1's broadcasts from getting to segment 2.
Configure the switch so that it has a lower priority than other switches in the network.

46. Which of the following devices can the Certkiller network administrator use to segment the LAN?
100 meters
Show arp and Show interface
Switches - Bridges - and Routers
It operates without collisions and It provides faster data transfer

47. 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?
Buffering - Cut-through - and Congestion avoidance
Duplex mismatch
Sequence number - Window size - and Acknowledgment number
It is the sum of the costs based on bandwidth

48. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An electrical pulse indicates that the collision has cleared.
Switches - Bridges - and Routers
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.

49. What is the purpose of the spanning-tree algorithm in a switched LAN?
Layer 3
Data link
A cross-over cable
To prevent switching loops in networks with redundant switched paths.

50. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches - Bridges - and Routers
Hosts use a logical bus topology
The Bridgeg ID and The bridge priority