4A0-105 Exam Questions
154 real 4A0-105 exam questions with expert-verified answers and explanations. Page 3 of 4.
- Question #105
The "discard-unknown" command has been enabled at the VPLS level. Which of the following statements is true? (Choose 2)
- Question #106
Which of the following statements regarding unicastand multicast frames is true for a traditional layer 2 switch? (Choose 2)
- Question #107
What option is available when using PBB to reduce the amount of required VPLS services?
- Question #108
Click on the exhibit below. The SAP on PE-A has been configured with dot1q encapsulation. The SAP on PE-B has been configured with qinq encapsulation. CE-A sends frames with a sing...
- Question #109
Click on the exhibit below. If the device connected to PE-A in Metro A sends a frame to PE-A that requires replication within the VPLS which devices is PE-A responsible for replica...
- Question #110
The command "send flush-on-failure" has been enabled within a VPLS instance. What does the PE do upon detection of a SAP failure within the VPLS?
- Question #111
Which physical topology is NOT commonly deployed in today's VPLS networks?
- Question #112
An l-VPLS can be associated with many B-VPLS services.
- Question #113
Click on the exhibit below. CE-A sends frames with 2 tags. If the SAP on PE-A is "sap 1/1/1:1 .*" and the SAP on PE- B is "sap 1/1/1:100.200" how many tags will there be on the fra...
- Question #114
Click on the exhibit below. Which port will become the alternate port?
- Question #115
The following question relates to this command syntax: "config>service# vpls 9000 customer 6 create". Which of the following statements are correct? (Choose 2)
- Question #118
Which of the following are required for an operational mesh-sdp binding for bidirectional traffic when signaling is enabled within the SDP?(Choose 3)
- Question #119
The service mtu of a VPLS is set to 9100. What is the recommended MTU value that can be set for the access port assuming dot1q encapsulation?
- Question #120
How does PBB forward broadcast, unknown-unicast and multicast traffic from a B-VPLS to an l- VPLS?
- Question #121
The service-mtu of a VPLS using MPLS encapsulation is set to 9100. What is the minimum MTU value that can be set for the network port if fast re-route facility mode is used on the...
- Question #122
A router has just learned the 10th MAC address while the FDB size is also set to 10. What is the likely outcome?
- Question #123
Click on the exhibit below. Which port will become the alternate port?
- Question #124
In IEEE 802.1ag,which two key functions are configured on bridge ports (SAPs and SDPs) to support CFM messages? (Choose 2)
- Question #125
An MC-LAG is configured with default parameters. When a failed interface recovers, the active link reverts to the restored interface.
- Question #126
What action will be taken when an MPLS router receives a frame with a label that does not exist in the LFIB?
- Question #127
Which of the following needs to be considered when designing Ethernet networks with redundancy?
- Question #128
Which of the following must be true in order to add a port to a LAG? (Choose 2)
- Question #129
Which of the following is a true statement?
- Question #130
Which of the following are true when ports are configured with the IEEE 802.3ah Loopback Control feature? (Choose 3)
- Question #131
In RSTP, how is the root bridge selected?
- Question #132
Click on the exhibit below. CE-A is on VLAN 200 and CE-B is on VLAN 300. Which of the following SAP ids can be configured on PE-A and PE-B to allow direct communication between CE-...
- Question #133
What action will be taken when an Ethernet switch receives a frame with a known DA and an outer Ethertype value of 0x0800 on a dot1q encapsulated port?
- Question #134
What function in IEEE 802.1 ah helps to limit the amount of MAC addresses learned in the core?
- Question #135
A LAG is configured with LACP passive mode enabled.When will LACP packets be sent?
- Question #136
In IEEE 802.1ag,how are loops detected?
- Question #137
The operation of a VPLS can be best described by which of the following statements?
- Question #138
Click on the exhibit below. In the diagram below, SAP 1 is put into the blocking state as a result of the spanning tree protocol. What will occur in the VPLS instance if SAP 2 goes...
- Question #139
Click on the exhibit below. A new router named PE-D is to be directly connected to PE-C and is required to be added to the existing VPLS 300. The design requires the least amount o...
- Question #140
Click on the exhibit below. Assume PE-B expects avian tag as part of the RFC 4762 (Martini) encapsulation. How must PE- A be configured?
- Question #141
What is PBB also known as?
- Question #142
An l-VPLS is configured with a service id of 511. What will the value of the l-SID be assuming a default configuration?
- Question #143
Which failure scenario is NOT supported by IEEE 802.lag?
- Question #144
Click on the exhibit below. Based on the following configuration which VLANs will be managed by the management VPLS?
- Question #145
Click on the exhibit below. Based on the service-mtu of this B-VPLS, what is the maximum service-mtu of any connectingI- VPLS attached to this B-VPLS?
- Question #146
Which of the following best describes the difference between VPWS and VPLS?
- Question #147
After the "disable-learning" command has been executed at the VPLS level, a new client device originates a frame. What is the result?
- Question #148
In the IEEE 802.1 ag, how are merged services detected?
- Question #149
Click on the exhibit below. The MDU attached to this PE has been configured with active/standby SDP's configuration option has been configured for the PE to recognize that this SDP...
- Question #150
Click on the exhibit below. Assume the port on CE-A is sending two tags, a top tag of 100 and a bottom tag of 500. PE-A is configured with a SAP id of 1/1/1:100.*. How should PE-B...
- Question #151
Click on the exhibit below. The following IP filter has been configured and applied to a SAP in a non-VPLS service. Which of the following statements is true?
- Question #152
Which PDU type is sent periodically over a link in the IEEE 802.3ah EFM as a method of keepalive?
- Question #153
In Rapid Spanning Tree Protocol, a Backup Port is on the same switch as a Designated Port?
- Question #154
Consider a large metro-to-metro VPLS network interconnected with a mesh of mesh-SDPs. Which of the following statements does NOT apply to this situation?
- Question #155
Which of the following statements about the VC-ID is false?
- Question #156
MC-LAG provides link and node protection from an MDU to 3 or more PE devices.