The Penultimate CCNA Practice Certification Exam # 2
You’ve hopefully been keeping your nose in your textbook for the last few weeks and months, and it should all pay off soon as we head into today’s second-to-last practice exam towards your Cisco Certified Network Associate. Are you ready for your certification or do you have more work to do?
- 1.
Refer to the exhibit. The exhibit shows simplified protocol data units from different OSI model layers. Which three statements are true about the PDUs and the encapsulation process? (Choose three.)
- A.
PDU #1 is a frame.
- B.
PDU #2 is an application layer PDU
- C.
PDU #3 is a segment.
- D.
PDU #4 is a transport layer PDU.
- E.
The order in which these PDUs are created during the encapsulation process is 3, 4, 1, 2.
- F.
The order in which these PDUs are created during the encapsulation process is 2, 1, 4, 3.
Correct Answer(s)
A. PDU #1 is a frame.
C. PDU #3 is a segment.
E. The order in which these PDUs are created during the encapsulation process is 3, 4, 1, 2.Explanation
PDU #1 is a frame because it is at the data link layer, which is responsible for framing data into frames. PDU #3 is a segment because it is at the transport layer, which segments data into smaller units for transmission. The correct order in which these PDUs are created during the encapsulation process is 3, 4, 1, 2, starting from the transport layer, then moving to the network layer, data link layer, and finally the application layer.Rate this question:
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- 2.
Which three application layer protocols use TCP? (Choose three.)
- A.
SMTP
- B.
FTP
- C.
SNMP
- D.
HTTP
- E.
TFTP
- F.
DHCP
Correct Answer(s)
A. SMTP
B. FTP
D. HTTPExplanation
SMTP, FTP, and HTTP are the three application layer protocols that use TCP. SMTP (Simple Mail Transfer Protocol) is used for sending and receiving email messages. FTP (File Transfer Protocol) is used for transferring files between a client and a server. HTTP (Hypertext Transfer Protocol) is used for transmitting and receiving web pages and other resources on the internet. These protocols require a reliable and connection-oriented transport protocol like TCP to ensure the successful delivery of data.Rate this question:
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- 3.
Which two application layer protocols use the UDP protocol? (Choose two.)
- A.
Telnet
- B.
SNMP
- C.
SMTP
- D.
SQL
- E.
TFTP
Correct Answer(s)
B. SNMP
E. TFTPExplanation
SNMP (Simple Network Management Protocol) and TFTP (Trivial File Transfer Protocol) both use the UDP (User Datagram Protocol) at the application layer. UDP is a connectionless protocol that provides a fast and lightweight communication method, making it suitable for applications like network management (SNMP) and file transfer (TFTP). Telnet, SMTP, and SQL, on the other hand, typically use TCP (Transmission Control Protocol) for reliable and ordered communication.Rate this question:
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- 4.
What are two functions that occur at the Internet layer of the TCP/IP model? (Choose two.)
- A.
Establishment of logical connections between source and destination hosts
- B.
End-to-end flow control
- C.
Determination of best paths through the network
- D.
Definition of the procedures used to interface with the network hardware
- E.
Packet switching
- F.
Layer 5 and Layer 6 OSI model functions
Correct Answer(s)
C. Determination of best paths through the network
E. Packet switchingExplanation
At the Internet layer of the TCP/IP model, two functions that occur are the determination of best paths through the network and packet switching. The determination of best paths through the network involves finding the most efficient routes for data to travel from the source to the destination. Packet switching is the process of breaking data into smaller packets and sending them individually across the network, allowing for more efficient and reliable transmission. These two functions work together to ensure that data is delivered efficiently and effectively across the network.Rate this question:
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- 5.
Refer to the exhibit. All ports on switch A are in the sales VLAN and all ports on switch B are in the accounting VLAN. How many broadcast domains and how many collision domains exist in the exhibited network? (Choose two.)
- A.
3 collision domains
- B.
3 broadcast domains
- C.
5 broadcast domains
- D.
9 collision domains
- E.
10 collision domains
- F.
13 collision domains
Correct Answer(s)
B. 3 broadcast domains
D. 9 collision domainsExplanation
In the exhibited network, there are three broadcast domains because each VLAN represents a separate broadcast domain. The sales VLAN on switch A and the accounting VLAN on switch B are two separate broadcast domains, and the third broadcast domain is the default VLAN, which includes all ports on both switches.
There are nine collision domains because each port on a switch represents a separate collision domain. Switch A has five ports in the sales VLAN, and switch B has four ports in the accounting VLAN. Therefore, there are a total of nine collision domains in the network.Rate this question:
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- 6.
A high-end Catalyst switch that supports both ISL and 802.1Q is to be connected by a link that will carry all VLAN traffic to a Catalyst 2960 LAN switch. What two commands are required to configure an interface on the high-end Catalyst switch to carry traffic from all VLANs to the Catalyst 2960 switch? (Choose two.)
- A.
Switch(config-if)# vlan all
- B.
Switch(config-if)# switchport access vlan 30
- C.
Switch(config-if)# switchport access vlan all
- D.
Switch(config-if)# switchport mode trunk
- E.
Switch(config-if)# switchport trunk encapsulation dot1q
- F.
Switch(config-if)# switchport trunk encapsulation isl
Correct Answer(s)
D. Switch(config-if)# switchport mode trunk
E. Switch(config-if)# switchport trunk encapsulation dot1qExplanation
To configure an interface on the high-end Catalyst switch to carry traffic from all VLANs to the Catalyst 2960 switch, the two required commands are "switchport mode trunk" and "switchport trunk encapsulation dot1q". The "switchport mode trunk" command is used to configure the interface as a trunk port, which allows traffic from multiple VLANs to pass through. The "switchport trunk encapsulation dot1q" command is used to specify that the trunk should use the IEEE 802.1Q encapsulation method for tagging VLAN traffic.Rate this question:
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- 7.
Refer to the exhibit. Based on the exhibited configuration and output, what would be the result of this command: Sw1# telnet 192.168.1.10
- A.
All packets will be dropped
- B.
The Telnet session will succeed.
- C.
An error message that says “Session terminated” will appear.
- D.
An error message that says “Password required, but none set” will appear.
Correct Answer
A. All packets will be droppedExplanation
Based on the exhibited configuration and output, the result of the command "telnet 192.168.1.10" would be that all packets will be dropped. This can be inferred from the fact that the output does not show any successful connection or response from the specified IP address, indicating that there is no active Telnet service or device available at that address. Therefore, any packets sent to that address will not be able to establish a connection and will be dropped.Rate this question:
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- 8.
Refer to the partial device configuration that is exhibited. For which network topology is the configuration appropriate? RtrA(config)# interface fastethernet 0/0 RtrA(config-if)# no shutdown RtrA(config-if)# interface fastethernet 0/0.18 RtrA(config-subif)# encapsulation dot1q 18 RtrA(config-subif)# ip address 10.1.18.1 255.255.255.0 RtrA(config-subif)# interface fastethernet 0/0.44 RtrA(config-subif)# encapsulation dot1q 44 RtrA(config-subif)# ip address 10.1.44.1 255.255.255.0 RtrA(config-subif)# interface fastethernet 0/0.22 RtrA(config-subif)# encapsulation dot1q 22 RtrA(config-subif)# ip address 10.1.22.1 255.255.255.0
- A.
Ans is d
- B.
Rfr
Correct Answer
A. Ans is d -
- 9.
Refer to the exhibit and the following error message from the SwA switch. 00:22:43: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk FastEthernet0/1 VLAN1. 00:22:43: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking FastEthernet0/1 on VLAN0001. Inconsistent port type. Considering that the link between the two switches is good and the correct type, what could cause this error message?
- A.
The Spanning Tree Protocol has been disabled on one switch.
- B.
The Spanning Tree Protocol has been disabled on both switches.
- C.
The IEEE 802.1Q trunking port has a speed mismatch on one of the switches.
- D.
The SwA port is configured as a trunk port and the SwB port is configured as an access port.
- E.
The SwA port has IEEE 802.1Q trunking enabled and the SwB port has ISL trunking enabled.
Correct Answer
D. The SwA port is configured as a trunk port and the SwB port is configured as an access port.Explanation
The error message indicates that the SwA switch received an 802.1Q BPDU on a non-trunk port, specifically FastEthernet0/1 VLAN1. This suggests that the SwA port is configured as a trunk port, which is designed to carry traffic for multiple VLANs, while the SwB port is configured as an access port, which is intended for a single VLAN. This inconsistency in port configuration can cause the error message to occur.Rate this question:
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- 10.
A network administrator is configuring a switch when an error message appears. The configuration commands and error message appear as follows: Switch(config)# interface fastethernet 0/1 Switch(config-if)# switchport mode trunk Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode. What is the problem?
- A.
The switch port is configured as an access mode port.
- B.
The switch port does not support trunking on this port.
- C.
The encapsulation type must be changed to a compatible protocol before the port can be placed in trunk mode.
- D.
The no switchport trunk encapsulation auto command needs to be applied to the switch port before trunking can be enabled.
Correct Answer
C. The encapsulation type must be changed to a compatible protocol before the port can be placed in trunk mode.Explanation
The error message indicates that the interface's trunk encapsulation is set to "Auto" and cannot be configured to "trunk" mode. This means that the current encapsulation protocol is not compatible with trunking. To resolve the issue, the administrator needs to change the encapsulation type to a compatible protocol before enabling trunk mode on the port.Rate this question:
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- 11.
Of the protocols that are listed, which one needs to be functioning on a link in order for VTP to operate?
- A.
802.1Q
- B.
CDP
- C.
RIP
- D.
RSTP
Correct Answer
A. 802.1QExplanation
VTP (VLAN Trunking Protocol) is a Cisco proprietary protocol used to manage VLANs in a network. In order for VTP to operate, the 802.1Q protocol needs to be functioning on a link. 802.1Q is an IEEE standard that defines the method for tagging VLAN information on Ethernet frames. It allows for the transmission of VLAN information between switches, enabling the creation and management of VLANs across a network. Therefore, the 802.1Q protocol is necessary for VTP to function properly.Rate this question:
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- 12.
Refer to the exhibit. RT_1 is configured correctly with IP addresses and passwords but none of the computers can ping or telnet to RT_1. Which series of commands would correct the problem?
- A.
RT_1(config)# interface fa0/1 RT_1(config-if)# no shutdown
- B.
SW_1(config)# interface fa0/24 SW_1(config-if)# switchport mode client
- C.
RT_1(config)# interface fa0/1 RT_1(config-if)# encapsulation trunk dot1q 24
- D.
SW_1(config)# interface fa0/24 SW_1(config-if)# switchport mode trunk
- E.
SW_1(config)# interface fa0/24 SW_1(config-if)# switchport access vlan 1
Correct Answer
D. SW_1(config)# interface fa0/24 SW_1(config-if)# switchport mode trunkExplanation
The computers are unable to ping or telnet to RT_1 because the interface fa0/24 on SW_1 is not configured correctly. By using the command "SW_1(config)# interface fa0/24 SW_1(config-if)# switchport mode trunk", the interface will be configured as a trunk port, allowing the VLAN traffic to pass between RT_1 and SW_1.Rate this question:
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- 13.
Refer to the exhibit. Which commands are needed to complete the switch configuration so that SSH can be used to telnet from host A to SW_1? (Choose two.)
- A.
SW_1(config)# username david password class
- B.
SW_1(config)# line vty 0 15 SW_1(config-line)# login SW_1(config-line)# password cisco
- C.
SW_1(config)# line vty 0 15 SW_1(config-line)# login local SW_1(config-line)# transport input ssh
- D.
SW_1(config)# login ssh SW_1(config)# password class
- E.
SW_1(config)# login key rsa SW_1(config)# password cisco
- F.
SW_1(config)# password encrypted cisco
Correct Answer(s)
A. SW_1(config)# username david password class
C. SW_1(config)# line vty 0 15 SW_1(config-line)# login local SW_1(config-line)# transport input sshExplanation
The two commands needed to complete the switch configuration are:
1. SW_1(config)# username david password class: This command creates a username "david" with a password "class" for authentication purposes.
2. SW_1(config)# line vty 0 15 SW_1(config-line)# login local SW_1(config-line)# transport input ssh: This command configures the virtual terminal lines (vty) for local login authentication and specifies that SSH is allowed as the transport input method. This allows SSH to be used for telnet from host A to SW_1.Rate this question:
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- 14.
What three factors contribute to congestion on an Ethernet LAN? (Choose three.)
- A.
Improper placement of enterprise level servers
- B.
Addition of hosts to a physical segment
- C.
Replacement of hubs with workgroup switches
- D.
Increasing use of bandwidth intensive network applications
- E.
Creation of new collision domains without first adding network hosts
- F.
Migration to full-duplex Ethernet within the LAN
Correct Answer(s)
A. Improper placement of enterprise level servers
B. Addition of hosts to a physical segment
D. Increasing use of bandwidth intensive network applicationsExplanation
The three factors that contribute to congestion on an Ethernet LAN are the improper placement of enterprise-level servers, the addition of hosts to a physical segment, and the increasing use of bandwidth-intensive network applications. Improper placement of servers can lead to uneven distribution of network traffic and bottleneck situations. Adding hosts to a physical segment without considering the capacity can also cause congestion. Additionally, the increasing use of bandwidth-intensive applications can consume a significant amount of network resources and contribute to congestion.Rate this question:
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- 15.
Refer to the exhibit. What protocol should be configured on SW-A Port 0/1 if it is to send traffic from multiple VLANs to switch SW-B?
- A.
Spanning Tree
- B.
RIP v2
- C.
IEEE 802.1Q
- D.
ARP
- E.
Rapid Spanning Tree
Correct Answer
C. IEEE 802.1QExplanation
The correct answer is IEEE 802.1Q. IEEE 802.1Q is a protocol used for VLAN tagging in Ethernet networks. By configuring IEEE 802.1Q on SW-A Port 0/1, it allows the switch to send traffic from multiple VLANs to switch SW-B by adding a VLAN tag to each Ethernet frame. This tag carries the VLAN information, allowing SW-B to correctly identify and handle the traffic from different VLANs.Rate this question:
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- 16.
Which three STP states were replaced with the RSTP discarding state? (Choose three.)
- A.
Listening
- B.
Learning
- C.
Blocking
- D.
Disabled
- E.
Forwarding
Correct Answer(s)
A. Listening
C. Blocking
D. DisabledExplanation
The RSTP (Rapid Spanning Tree Protocol) replaced the STP (Spanning Tree Protocol) states of listening, blocking, and disabled with its own discarding state. In RSTP, the discarding state is equivalent to the listening state in STP, where the switch receives BPDUs (Bridge Protocol Data Units) but does not forward any frames. The blocking state in STP, where the switch does not forward frames but still participates in the STP topology, is replaced by the discarding state in RSTP. Additionally, the disabled state in STP, where the switch is completely inactive, is also replaced by the discarding state in RSTP.Rate this question:
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- 17.
Refer to the exhibit. What is the role of the SW3 switch?
- A.
Designated switch
- B.
Edge switch
- C.
Root bridge
- D.
Enabled bridge
- E.
Local bridge
Correct Answer
C. Root bridgeExplanation
The role of the SW3 switch is to act as the root bridge in the network. The root bridge is responsible for initiating the spanning tree protocol (STP) and determining the shortest path for data transmission in the network. It is the central point of the network and all other switches in the network are connected to it. By being the root bridge, SW3 ensures efficient and optimal data transmission by preventing loops and selecting the best paths for communication.Rate this question:
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- 18.
Refer to the exhibit. A switch can be configured for three different forwarding modes based on how much of a frame is received before the forwarding process begins. Each of the numbered arrows in the accompanying graphic signifies the point in a frame where a particular forwarding mode will begin. Which group of labels reflects the sequence of forwarding modes signified by the numbered arrows?
- A.
1) fast forward 2) fragment free 3) store-and-forward
- B.
Oh;kljh'k
Correct Answer
A. 1) fast forward 2) fragment free 3) store-and-forwardExplanation
The correct sequence of forwarding modes signified by the numbered arrows is 1) fast forward, 2) fragment free, and 3) store-and-forward.Rate this question:
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Mar 17, 2023Quiz Edited by
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