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NEW QUESTION 1
Which spanning-tree mode can be used to map several VLANs to a single spanning-tree instance?

  • A. MST
  • B. PVST+
  • C. PVRST+
  • D. RSTP

Answer: A

NEW QUESTION 2
Refer to the exhibit.
640-878 dumps exhibit
Which three statements about MPLS LDP operations are true?

  • A. The incoming label for 10.2.10.1/32 is 16010 (which is allocated by the local router), and theoutgoing label is 22 (as advertised by the next-hop router).
  • B. The 16003 and 16010 labels are learned from the 192.168.112.40 LDP neighbor.
  • C. The ImpNull outgoing label for the 192.168.102.0/24 network means that the outgoing label should be removed when sending packets to the 192.168.112.40 next-hop router, when the incoming label is 16003.
  • D. The ImpNull outgoing label for the 192.168.102.0/24 network means that the local router has not received a label for that network from its neighbor.
  • E. The Unlabeled outgoing label for 10.10.10.100/32 indicates that a label pop is required when sending packets to the 10.10.10.1 next-hop router.
  • F. The outgoing label of 22 for 10.2.10.1/32 is learned from the 192.168.112.40 LDP neighbor.

Answer: ACF

Explanation: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t2/feature/guide/ldp_221t.html

NEW QUESTION 3
A customer has been allocated a new VLAN on a new Layer 3 switch. After configuring the Switched Virtual Interface, what additional two configurations are required to ensure the switch can route packets to the Internet through a gateway with IP address of 209.165.200.250? (Choose two.)

  • A. IP default-gateway 209.165.200.250
  • B. IP routing
  • C. IP route 0.0.0.0 0.0.0.0 209.165.200.250
  • D. IP routing 0.0.0.0 0.0.0.0 209.165.200.250
  • E. IP networking

Answer: BC

NEW QUESTION 4
What package provides the software for the route processor in the IOS XE Software?

  • A. RPIOS
  • B. ESPBase
  • C. RPControl
  • D. RPBase
  • E. SIP SPA

Answer: D

NEW QUESTION 5
Refer to the configuration snippet below. A network engineer has been tasked with implementing a security policy that prevents subnet 209.165.202.128/27 from accessing web server 209.165.200.224. All users are now unable to access the web server. What command is missing from the access list configuration?
Configuration:
switch(config)#access-list 1 deny 209.165.202.128 0.0.0.31 209.165.200.224 switch(config)#interface FastEthernet 0/0
switch(config-if)# ip access-group 1 in

  • A. switch(config-if)#ip access-group 1 out
  • B. switch(config)#ip access-list 2 permit any any
  • C. switch#ip access-list 2 permit any any
  • D. switch(config)#ip access-list 1 permit any any

Answer: D

NEW QUESTION 6
Which three statements about VLAN implementation in a Layer 2 switch environment are true? (Choose three.)

  • A. The Cisco IOS switchport access vlan interface configuration command is used to configure the native VLAN on the switch port.
  • B. 802.1AD supports VLAN overlap.
  • C. VLANs can span across multiple switches.
  • D. 802.1Q encapsulation is used to identify different VLANs on a trunk port.
  • E. Inter-VLAN routing is performed between VLAN tunnel ports.

Answer: BCD

Explanation:
IEEE 802.1ad[note 1] is an Ethernet networking standard informally known as IEEE 802.1QinQ and is an amendment to IEEE standard IEEE 802.1Q-1998. The technique is also known as provider bridging, Stacked VLANs or simply QinQ or Q-in-Q.
The original 802.1Q specification allows a single VLAN header to be inserted into an Ethernet frame. QinQ allows multiple VLAN headers to be inserted into a single frame, an essential capability for implementing Metro Ethernet network topologies. Just as QinQ extends 802.1Q, QinQ itself is extended by other Metro Ethernet protocols.[specify] In a multiple VLAN header context, out of convenience the term "VLAN tag" or just "tag" for short is often used in place of "802.1Q VLAN header". QinQ allows multiple VLAN tags in an Ethernet frame; together these tags constitute a tag stack. When used in the context of an Ethernet frame, a QinQ frame is a frame that has 2 VLAN 802.1Q headers (double-tagged).
There is a mild confusion regarding the naming because the 802.1ad standard was grown out of the 802.1QinQ protocol (which was developed based the trademarked method 802.1Q, with capital "Q" as a distinction instead of the 802.1q as the standardised protocol) which originally used 0x9100 as ethernet type instead of 0x88a8. While the network industry usually mix the naming the proper, standardised name is 802.1ad which sometimes gets appended by the other alternative names mentioned above; the plain "802.1QinQ" name usually refers to the old standard which is now considered obsolete

NEW QUESTION 7
Refer to the partial Cisco IOS router configuration exhibit.
640-878 dumps exhibit
Which statement is true?

  • A. To support the subinterface configuration, the Fa0/0 main interface configuration is missing the encapsulation dot1Q command.
  • B. The Fa0/0 interface/subinterfaces are configured correctly to operate as a trunk port to provide inter-VLAN routing for three VLANs (VLANs 1, 2, and 3).
  • C. To provide inter-VLAN routing, the Fa0/0.1, Fa0/0.2 and Fa0/0.3 subinterface configuration is missing the encapsulation dot1Q vlan-id subinterface configuration command.
  • D. To provide inter-VLAN routing, the router is missing the vlan 1, vlan 2, and vlan 3 global configuration commands.

Answer: C

NEW QUESTION 8
Which commands will configure the spanning tree operating mode that can group multiple VLANs in a single domain?

  • A. switch(config)#spanning-tree mode pvst
  • B. switch(config)#spanning-tree mode rstp
  • C. switch(config)#spanning-tree mode rapid-pvst
  • D. switch(config)#spanning-tree mode mst
  • E. switch(config)#spanning-tree mode mst-plus

Answer: D

NEW QUESTION 9
Which first-hop router redundancy protocol uses the active virtual gateway to assign a virtual MAC address to the active virtual forwarders?

  • A. HSRP
  • B. VRRP
  • C. GLBP
  • D. FHRP

Answer: C

Explanation: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html

NEW QUESTION 10
When configuring a new VLAN on Cisco IOS switches, which configuration parameter is required?

  • A. VLAN name
  • B. native VLAN ID
  • C. VLAN ID
  • D. VLAN map
  • E. VLAN MTU

Answer: C

NEW QUESTION 11
Refer to the topology diagram in the exhibit.
640-878 dumps exhibit
Which two interface configuration commands on the Cisco ME 3400-1 switch Fa 0/1 interface are required to support the VLANs for Customer A to be trunked across the service provider network? (Choose two.)

  • A. switchport access vlan 30
  • B. switchport mode trunk
  • C. switchport mode dot1q-tunnel
  • D. switchport trunk allowed vlan 1-100

Answer: AC

Explanation: http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_25_ex/configurat ion/guide/swtunnel.html

NEW QUESTION 12
A company begins offering SIP and PRI trunks to customers. Which type of Service Provider is this?

  • A. Managed Service Provider
  • B. Internet Service Provider
  • C. Telecommunications Service Provider
  • D. Distributed Networking Service Provider

Answer: C

NEW QUESTION 13
What type of package is bootable on the Cisco ASR 1000 router running IOS-XE?

  • A. boot package
  • B. consolidated package
  • C. sub-package
  • D. supplemental package

Answer: B

NEW QUESTION 14
What do both Carrier Grade NAT and NAT64 have in common?

  • A. both are only used in carrier networks
  • B. both are used for tunneling IPv6 in an IPv4 network
  • C. both require the use IPv6
  • D. both are methods for avoiding IPv4 address exhaustion

Answer: D

NEW QUESTION 15
Refer to the exhibit.
640-878 dumps exhibit
The access list has been configured on the Gi0/0/0/0 interface in the inbound direction. Which four packets that are sourced from 10.1.1.1 TCP port 1060, if they are routed to the Gi0/0/0/0 interface, will be permitted? (Choose four)

  • A. destination IP address: 192.168.15.37, destination TCP port: 8080
  • B. destination IP address: 192.168.15.41, destination TCP port: 8080
  • C. destination IP address: 192.168.15.49, destination TCP port: 8080
  • D. destination IP address: 192.168.15.36, destination TCP port: 80
  • E. destination IP address: 192.168.15.46, destination TCP port: 80
  • F. destination IP address: 192.168.15.49, destination TCP port: 80

Answer: CDEF

NEW QUESTION 16
A network administrator is troubleshooting an issue whereupon they able to ping the web server, but unable to web browse to the same web server. When the administrator telnets to the webserver on port 80, the administrator gets a connection refused message. At which three layers of the OSI model does the problem exist? (Choose three.)

  • A. Layer 1
  • B. Layer 2
  • C. Layer 3
  • D. Layer 4
  • E. Layer 5
  • F. Layer 6
  • G. Layer 7

Answer: DEG

NEW QUESTION 17
Which Cisco platform runs the Cisco IOS XE operating system?

  • A. Cisco ASR9K
  • B. Cisco CRS
  • C. Cisco 12000 GSR
  • D. Cisco ASR1K
  • E. Cisco ME 3400
  • F. Cisco ISR-G2

Answer: D

Explanation: http://www.cisco.com/en/US/prod/collateral/routers/ps9343/product_bulletin_c25-448387.html

NEW QUESTION 18
When upgrading a Cisco ASR 1001 Router, when is the request platform software package expand file bootflash:image-name command required?

  • A. to copy the consolidated Cisco IOS XE image to the bootflash:
  • B. to perform Cisco IOS ISSU on the standby route processor
  • C. to run the router using a consolidated package
  • D. to run the router using individual subpackages

Answer: D

Explanation: http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/chassis/asrswcfg.pdf
640-878 dumps exhibit

NEW QUESTION 19
Which three statements about service provider network requirements are true? (Choose three.)

  • A. Service provider networks are becoming more specialized, with providers offering only one service.
  • B. Service providers connect customers to the Internet.
  • C. Jitter and packet loss are no longer an issue.
  • D. Multiple access technologies are supported.
  • E. Customers can connect directly using copper, wireless, or fiber-optic links.

Answer: BDE

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