[Free] 2019(Nov) EnsurePass Cisco 400-101 Dumps with VCE and PDF 241-250

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Question No.241

Which two pieces of information does RTCP use to inform endpoint devices about the RTP flow? (Choose two.)

  1. the transmitted octet

  2. the lost packet count

  3. session control function provisioning information

  4. the CNAME for session participants

  5. the authentication method

  6. MTU size changes in the path of the flow

Correct Answer: AB


RTCP transports statistics for a media connection and information such as transmitted octet and packet counts, packet loss, packet delay variation, and round-trip delay time. An application may use this information to control quality of service parameters, perhaps by limiting flow, or using a different codec.

Reference: http://en.wikipedia.org/wiki/RTP_Control_Protocol

Question No.242

Which two statements about class maps are true? (Choose two.)

  1. As many as eight DSCP values can be included in a match dscp statement.

  2. The default parameter on a class map with more than one match command is match-any.

  3. The match class command can nest a class map within another class map.

  4. A policy map can be used to designate a protocol within a class map.

Correct Answer: AC Explanation: Answer A:

Router(config-cmap)# match [ip] dscp dscp-value [dscp-value dscp-value dscp-value dscp-value dscp-value dscp-value dscp-value]

(Optional) Identifies a specific IP differentiated service code point (DSCP) value as a match criterion. Up to eight DSCP values can be included in one match statement.

Answer C:

Router config-cmap)# match class-map class-name

(Optional) Specifies the name of a traffic class to be used as a matching criterion (for nesting traffic class [nested class maps] within one another).

Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/qos/configuration/guide/fqos_c/qcfmcli2.html

Question No.243

In the DiffServ model, which class represents the lowest priority with the highest drop probability?

  1. AF11

  2. AF13

  3. AF41

  4. AF43

Correct Answer: B


Assured Forwarding (AF) Behavior Group

Class 1

Class 2

Class 3

Class 4 Low Drop

AF11 (DSCP 10)

AF21 (DSCP 18)

AF31 (DSCP 26)

AF41 (DSCP 34)

Med Drop

AF12 (DSCP 12)

AF22 (DSCP 20)

AF32 (DSCP 28)

AF42 (DSCP 36)

High Drop

AF13 (DSCP 14)

AF23 (DSCP 22)

AF33 (DSCP 30)

AF43 (DSCP 38)

Reference: http://en.wikipedia.org/wiki/Differentiated_services

Question No.244

Refer to the exhibit. Which statement about configuring the switch to manage traffic is true?


  1. The switchport priority extend cos command on interface FastEthernet0/0 prevents traffic to and from the PC from taking advantage of the high-priority data queue that is assigned to the IP phone.

  2. The switchport priority extend cos command on interface FastEthernet0/0 enables traffic to and from the PC to use the high priority data queue that is assigned to the IP phone.

  3. When the switch is configured to trust the CoS label of incoming traffic, the trusted boundary feature is disabled automatically.

  4. The mls qos cos override command on interface FastEthernet0/0 configures the port to trust the CoS label of traffic to and from the PC.

Correct Answer: A


In some situations, you can prevent a PC connected to the Cisco IP Phone from taking advantage of a high-priority data queue. You can use the switchport priority extend cos interface configuration command to configure the telephone through the switch CLI to override the priority of the traffic received from the PC.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12- 1_22_ea2/configuration/guide/2950scg/swqos.html

Question No.245

Which statement is true when using a VLAN ID from the extended VLAN range (1006-4094)?

  1. VLANs in the extended VLAN range can be used with VTPv2 in either client or server mode.

  2. VLANs in the extended VLAN range can only be used as private VLANs.

  3. STP is disabled by default on extended-range VLANs.

  4. VLANs in the extended VLAN range cannot be pruned.

Correct Answer: D


Enabling VTP pruning on a VTP server enables pruning for the entire management domain. Making VLANs pruning-eligible or pruning-ineligible affects pruning eligibility for those VLANs on that device only (not on all switches in the VTP domain). VTP pruning takes effect several seconds after you enable it. VTP pruning does not prune traffic from VLANs that are pruning- ineligible. VLAN 1 and VLANs 1002 to 1005 are always pruning-ineligible; traffic from these VLANs cannot be pruned. Extended-range VLANs (VLAN IDs higher than 1005) are also pruning- ineligible.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12- 1_13_ea1/configuration/guide/3550scg/swvtp.html#wpxref48156

Question No.246

Which statement is true about trunking?

  1. Cisco switches that run PVST do not transmit BPDUs on nonnative VLANs when using a dot1q trunk.

  2. When removing VLAN 1 from a trunk, management traffic such as CDP is no longer passed in that VLAN.

  3. DTP only supports autonegotiation on 802.1q and does not support autonegotiation for ISL.

  4. DTP is a point-to-point protocol.

Correct Answer: D


Ethernet trunk interfaces support different trunking modes. You can set an interface as trunking or nontrunking or to negotiate trunking with the neighboring interface. To autonegotiate trunking, the interfaces must be in the same VTP domain.

Trunk negotiation is managed by the Dynamic Trunking Protocol (DTP), which is a Point-to-Point Protocol. However, some internetworking devices might forward DTP frames improperly, which could cause misconfigurations.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12- 2_55_se/configuration/guide/scg3750/swvlan.html

Question No.247

Which two options are EIGRP route authentication encryption modes? (Choose two.)

  1. MD5

  2. HMAC-SHA2-256bit

  3. ESP-AES


Correct Answer: AB


Packets exchanged between neighbors must be authenticated to ensure that a device accepts packets only from devices that have the same preshared authentication key. Enhanced Interior Gateway Routing Protocol (EIGRP) authentication is configurable on a per-interface basis; this means that packets exchanged between neighbors connected through an interface are authenticated. EIGRP supports message digest algorithm 5 (MD5) authentication to prevent the introduction of unauthorized information from unapproved sources. MD5 authentication is defined in RFC 1321. EIGRP also supports the Hashed Message Authentication Code-Secure Hash Algorithm-256 (HMAC-SHA-256) authentication method.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/xe-3s/ire- xe-3s-book/ire-sha-256.html

Question No.248



Correct Answer:


Question No.249

Which two statements about the function of a PIM designated router are true? (Choose two.)

  1. It forwards multicast traffic from the source into the PIM network.

  2. It registers directly connected sources to the PIM rendezvous point.

  3. It sends PIM Join/Prune messages for directly connected receivers.

  4. It sends IGMP queries.

  5. It sends PIM asserts on the interfaces of the outgoing interface list.

Correct Answer: BC


In PIM ASM and SSM modes, the software chooses a designated router (DR) from the routers on each network segment. The DR is responsible for forwarding multicast data for specified groups and sources on that segment.

In ASM mode, the DR is responsible for unicasting PIM register packets to the RP. When a DR receives an IGMP membership report from a directly connected receiver, the shortest path is

formed to the RP, which may or may not go through the DR. The result is a shared tree that connects all sources transmitting on the same multicast group to all receivers of that group. In SSM mode, the DR triggers (*, G) or (S, G) PIM join messages toward the RP or the source. The path from the receiver to the source is determined hop by hop. The source must be known to the receiver or the DR.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx- os/multicast/configuration/guide/n7k_multic_cli_5x/pim.html#wp1054047

Question No.250

Refer to the exhibit. Which two routes are included in the route update? (Choose two.)







Correct Answer: CD


This access list will permit the,,, and subnets.

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