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Exam A
QUESTION 1
Which of the following devices performs transparent bridging?
A. Ethernet hub
B. Layer 2 switch
C. Layer 3 switch
D. Router
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 2
When a PC is connected to a Layer 2 switch port, how far does the collision domain spread?
A. No collision domain exists.
B. One switch port.
C. One VLAN.
D. All ports on the switch.
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 3
What information is used to forward frames in a Layer 2 switch?
A. Source MAC address
B. Destination MAC address
C. Source switch port
D. IP addresses
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 4
What does a switch do if a MAC address cannot be found in the CAM table?
A. The frame is forwarded to the default port.
B. The switch generates an ARP request for the address.
C. The switch floods the frame out all ports (except the receiving port).
D. The switch drops the frame.
Correct Answer: C Section: (none) Explanation Explanation/Reference:
QUESTION 5
In the Catalyst 6500, frames can be filtered with access lists for security and QoS purposes. This filtering occurs according to which of the following?
A. Before a CAM table lookup
B. After a CAM table lookup
C. Simultaneously with a CAM table lookup
D. According to how the access lists are configured
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 6
Access list contents can be merged into which of the following?
A. CAM table
B. TCAM table
C. FIB table
D. ARP table
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 7
Multilayer switches using CEF are based on which of these techniques?
A. Route caching
B. Netflow switching
C. Topology-based switching
D. Demand-based switching
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 8
Which answer describes multilayer switching with CEF?
A. The first packet is routed and then the flow is cached.
B. The switch supervisor CPU forwards each packet.
C. The switching hardware learns station addresses and builds a routing database.
D. A single database of routing information is built for the switching hardware.
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 9
In a switch, frames are placed in which buffer after forwarding decisions are made?
A. Ingress queues
B. Egress queues
C. CAM table
D. TCAM
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 10
What size are the mask and pattern fields in a TCAM entry?
A. 64 bits
B. 128 bits
C. 134 bits
D. 168 bits
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 11
Access list rules are compiled as TCAM entries. When a packet is matched against an access list, in what order are the TCAM entries evaluated?
A. Sequentially in the order of the original access list.
B. Numerically by the access list number.
C. Alphabetically by the access list name.
D. All entries are evaluated in parallel.
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 12
Which Catalyst IOS command can you use to display the addresses in the CAM table?
A. show cam
B. show mac address-table
C. show mac
D. show cam address-table
Correct Answer: B Section: (none) Explanation
Explanation/Reference: Exam B
QUESTION 1
What does the IEEE 802.3 standard define?
A. Spanning Tree Protocol
B. Token Ring
C. Ethernet
D. Switched Ethernet
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 2
At what layer are traditional 10-Mbps Ethernet, Fast Ethernet, and Gigabit Ethernet the same?
A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 3
At what layer are traditional 10-Mbps Ethernet, Fast Ethernet, and Gigabit Ethernet different?
A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 4
What is the maximum cable distance for a Category 5 100BASE-TX connection?
A. 100 feet
B. 100 m
C. 328 m
D. 500 m
Correct Answer: B Section: (none) Explanation Explanation/Reference:
QUESTION 5
Ethernet autonegotiation determines which of the following?
A. Spanning-tree mode
B. Duplex mode
C. Quality of service mode
D. Error threshold
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 6
Which of the following cannot be automatically determined and set if the far end of a connection doesn’t support autonegotiation?
A. Link speed
B. Link duplex mode
C. Link media type
D. MAC address
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 7
Which of these is not a standard type of gigabit interface converter (GBIC) or small form factor pluggable (SFP) module?
A. 1000BASE-LX/LH
B. 1000BASE-T
C. 1000BASE-FX
D. 1000BASE-ZX
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 8
What type of cable should you use to connect two switches back to back using their Fast Ethernet 10/100 ports?
A. Rollover cable
B. Transfer cable
C. Crossover cable
D. Straight-through cable
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 9
Assume that you have just entered the configure terminal command. To configure the speed of the first Fast Ethernet interface on Cisco Catalyst switch module number one to 100 Mbps, which one of these commands should you enter first?
A. speed 100 mbps
B. speed 100
C. interface fastethernet 1/0/1
D. interface fast ethernet 1/0/1
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 10
If a switch port is in the errdisable state, what is the first thing you should do?
A. Reload the switch.
B. Use the clear errdisable port command.
C. Use the shut and no shut interface-configuration commands.
D. Determine the cause of the problem.
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 11
Which of the following show interface output information can you use to diagnose a switch port problem?
A. Port state.
B. Port speed.
C. Input errors.
D. Collisions.
E. All these answers are correct.
Correct Answer: E Section: (none) Explanation
Explanation/Reference: Exam C QUESTION 1
A VLAN is which of the following?
A. Collision domain
B. Spanning-tree domain
C. Broadcast domain
D. VTP domain
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 2
Switches provide VLAN connectivity at which layer of the OSI model?
A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 3
Which one of the following is needed to pass data between two PCs, each connected to a different VLAN?
A. Layer 2 switch
B. Layer 3 switch
C. Trunk
D. Tunnel
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 4
Which Catalyst IOS switch command is used to assign a port to a VLAN?
A. access vlan vlan-id
B. switchport access vlan vlan-id
C. vlan vlan-id
D. set port vlan vlan-id
Correct Answer: B Section: (none) Explanation Explanation/Reference:
QUESTION 5
Which of the following is a standardized method of trunk encapsulation?
A. 802.1d
B. 802.1Q
C. 802.3z
D. 802.1a
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 6
What is the Cisco proprietary method for trunk encapsulation?
A. CDP
B. EIGRP
C. ISL
D. DSL
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 7
Which of these protocols dynamically negotiates trunking parameters?
A. PAgP
B. STP
C. CDP
D. DTP
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 8
How many different VLANs can an 802.1Q trunk support?
A. 256
B. 1024
C. 4096
D. 32,768
E. 65,536
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 9
Which of the following incorrectly describes a native VLAN?
A. Frames are untagged on an 802.1Q trunk.
B. Frames are untagged on an ISL trunk.
C. Frames can be interpreted by a nontrunking host.
D. The native VLAN can be configured for each trunking port.
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 10
If two switches each support all types of trunk encapsulation on a link between them, which one will be negotiated?
A. ISL
B. 802.1Q
C. DTP
D. VTP
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 11
Which VLANs are allowed on a trunk link by default?
A. None
B. Only the native VLAN
C. All active VLANs
D. Only negotiated VLANs
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 12
Which command configures a switch port to form a trunk without using negotiation?
A. switchport mode trunk
B. switchport mode trunk nonegotiate
C. switchport mode dynamic auto
D. switchport mode dynamic desirable
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 13
Two hosts are connected to switch interfaces Fast Ethernet 0/1 and 0/33, but they
cannot communicate with each other. Their IP addresses are in the 192.168.10.0/24
subnet, which is carried over VLAN 10. The show vlan id 10 command generates the
following output:
Switch# show vlan id 10
VLAN Name Status Ports
—————————————————————
Users active Fa0/1, Fa0/2, Fa0/3, Fa0/4,
Fa0/5, Fa0/6, Fa0/7, Fa0/8,
Fa0/9, Fa0/10, Fa0/11, Fa0/12,
Fa0/13, Fa0/14, Fa0/15, Fa0/16,
Fa0/17, Fa0/18, Fa0/19, Fa0/20,
Fa0/21, Fa0/22, Fa0/23, Fa0/25,
Fa0/26, Fa0/27, Fa0/28, Fa0/31,
Fa0/32, Fa0/34, Fa0/35, Fa0/36,
Fa0/37, Fa0/39, Fa0/40, Fa0/41,
Fa0/42, Fa0/43, Fa0/46
The hosts are known to be up and connected. Which of the following reasons might be causing the
problem?
A. The two hosts are assigned to VLAN 1.
B. The two hosts are assigned to different VLANs.
C. Interface FastEthernet0/33 is a VLAN trunk.
D. The two hosts are using unregistered MAC addresses.
Correct Answer: BC Section: (none) Explanation
Explanation/Reference:
QUESTION 14
A trunk link between two switches did not come up as expected.
The configuration on Switch A is as follows: Switch A# show running-config interface gigabitethernet0/1 interface GigabitEthernet0/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 1-10 switchport mode dynamic auto no shutdown
The interface configuration on Switch B is as follows: Switch B# show running-config interface gigabitethernet0/1 interface GigabitEthernet0/1 switchport trunk encapsulation dot1q switchport mode dynamic auto switchport access vlan 5 no shutdown
Which one of the following reasons is probably causing the problem?
A. The two switches don’t have matching switchport trunk allowed vlan commands.
B. Neither switch has a native VLAN configured.
C. Both switches are configured in the dynamic auto mode.
D. Switch B is configured to use access VLAN 5.
Correct Answer: BC Section: (none) Explanation
Explanation/Reference: Exam D
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