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Test your basic knowledge |
CCNA Hard
Start Test
Study First
Subjects
:
cisco
,
it-skills
,
ccna
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. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
SMTP - FTP - HTTP - and HTTPS
Layer 3
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
2. 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.
802.1Q and ISL
Congestion avoidance - Windowing and Buffering
A broadcast address will never be the source address of a frame
3. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
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.
It is the sum of the costs based on bandwidth
Layer 4
Encapsulations PPP and authentication CHAP
4. 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?
Layer 4
Layer 4
The network layer
Duplex mismatch
5. 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
The port is experiencing errors
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Learning - Listening - and Forwarding
Layer 4
6. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
Decrease the window size.
MAC Address and Bridge Priority
Switches - Bridges - and Routers
7. Which of the following are spanning tree port states?
A broadcast address will never be the source address of a frame
Layer 4
Device Identifiers - Capabilities list - Platform
Learning - Listening - and Forwarding
8. What is the IEEE standard associated with Gigabit Ethernet?
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.
Encapsulations PPP and authentication CHAP
Layer 4
802.3ab and 802.3z
9. 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?
SMTP FTP and HTTP
The sequence number in the TCP header.
The switch will forward the frame to a specific port
A hub and A repeater.
10. CDP is running between two CK devices. What information is supplied by CDP?
The network layer
MAC Address and Bridge Priority
An additional broadcast domain will be created.
Device Identifiers - Capabilities list - Platform
11. Which of the following correctly describe the various functions and virtues of a router?
The system is malfunctioning.
Learning - Listening - and Forwarding
Packet switching - Packet filtering and Internetwork communication.
Show cdp neighbor detail
12. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Application
Switches increase the number of collision domains in the 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
13. 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?
Network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
This is an Ethernet port operating at half duplex
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.
14. What is the purpose of the spanning-tree algorithm in a switched LAN?
Packet switching - Packet filtering and Internetwork communication.
To prevent switching loops in networks with redundant switched paths.
Transport
CertK Switch(config)# ip default-gateway 192.168.1.115
15. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Transport
Auto - Desirable - and On
Path selections and Packet switching.
16. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
A hub and A repeater.
Show cdp neighbor detail
Data link
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.
17. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The network layer
A cross-over cable
Source Port - Acknowledgment Number - and Window
Certkiller B > trace
18. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.
A cross-over cable
19. 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
Configure the switch so that it has lower priority than other switches in the network
HTTPS - SMTP - and TFTP
Layer 3
20. 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?
802.3ab and 802.3z
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.1Q and ISL
A broadcast address will never be the source address of a frame
21. 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?
An additional broadcast domain will be created.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
In an improperly implemented redundant topology
CertK Switch(config)# ip default-gateway 192.168.1.115
22. 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
The sequence number in the TCP header.
Hosts use a logical bus topology
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
23. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Switches increase the number of collision domains in the network.
A broadcast address will never be the source address of a frame
The network layer
24. 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?
An electrical pulse indicates that the collision has cleared.
The Bridgeg ID and The bridge priority
Layer 3
STP
25. 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?
Data link
Switches increase the number of collision domains in the network.
The port is experiencing errors
VTP
26. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Fiber optic cable.
Application
To allow remote management of the switch.
27. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
Duplex mismatch
Data link
28. What are two characteristics of 'store and forward' switching?
HTTPS - SMTP - and TFTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Show cdp neighbor detail
Application
29. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
MAC Address and Bridge Priority
VTP will allow switches to share VLAN configuration information
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
30. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
The sequence number in the TCP header.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The port is experiencing errors
31. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
It will prevent segment 1's broadcasts from getting to segment 2.
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.
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
32. 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?
Physical Layer and Datalink Layer
MAC Address and Bridge Priority
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.
33. Which fields are included in the TCP header?
Duplex mismatch
Source Port - Acknowledgment Number - and Window
Decrease the window size.
Switches increase the number of collision domains in the network.
34. 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.)
MAC Address and Bridge Priority
Network
Buffering - Cut-through - and Congestion avoidance
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.
35. In a switched LAN network - What is the Spanning-Tree algorithm used for?
An additional broadcast domain will be created.
Configure the switch so that it has a lower priority than other switches in the network.
Switches increase the number of collision domains in the network.
It is used to prevent switching loops in networks with redundant switched routes.
36. 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?
Congestion avoidance - Windowing and Buffering
Port security
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.
VTP will allow switches to share VLAN configuration information
37. 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?
Sequence number - Window size - and Acknowledgment number
Application
It will prevent segment 1's broadcasts from getting to segment 2.
Device Identifiers - Capabilities list - Platform
38. Which of the following can lead to the contribution of LAN traffic congestion?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
100 meters
VLAN and Swtich
39. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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 domain with too many hosts - Broadcast storms - and Low bandwidth
TCP
40. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
The interfaces must be configured for NAT.
In an improperly implemented redundant topology
Sequence number - Window size - and Acknowledgment number
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.
41. 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.
An electrical pulse indicates that the collision has cleared.
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
42. 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?
Switches - Bridges - and Routers
This is an Ethernet port operating at half duplex
Certkiller B > trace
A hub and A repeater.
43. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
This is an Ethernet port operating at half duplex
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Show cdp neighbor detail
44. 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?
VTP will allow switches to share VLAN configuration information
It operates without collisions and It provides faster data transfer
Encapsulations PPP and authentication CHAP
Switches increase the number of collision domains in the network.
45. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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
Switches - Bridges - and Routers
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.
46. 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?
Encapsulations PPP and authentication CHAP
TCP
The port is experiencing errors
Increased latency and Filtering of all frame errors
47. 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
Configure the switch so that it has lower priority than other switches in the network
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.
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.
48. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
100 meters
Auto - On - and Desirable
It operates without collisions and It provides faster data transfer
Fiber optic cable.
49. Which of the following are types of flow control?
Auto - Desirable - and On
Packet switching - Packet filtering and Internetwork communication.
Buffering - Cut-through - and Congestion avoidance
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
50. 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?
Physical Layer and Datalink Layer
Buffering - Cut-through - and Congestion avoidance
VTP
Configure the switch so that it has a lower priority than other switches in the network.