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Q371. Which two statements about the MAC address table space are true? (Choose two.)
A. You can disable learning on a VLAN to reduce table-space requirements.
B. When you disable learning on a VLAN with an SVI, IP packet flooding in the Layer 2 domain is also disabled.
C. Unicast, multicast, and broadcast MAC address filtering is configured globally and disabled by default.
D. The default setting for static MAC addresses to age out of the MAC address table is 300 seconds.
E. Turning off MAC learning on VLANs 900 through 1005 disables learning on VLANs 900 through 1001.
Answer: A,E
Q372. DRAG DROP
Drag and drop each BGP feature on the left to the corresponding function it performs on the right.
Answer:
Q373. Which two modes of operation does BFD support? (Choose two.)
A. synchronous mode
B. asynchronous mode
C. demand mode
D. echo mode
E. aggressive mode
F. passive mode
Answer: B,C
Explanation:
A session may operate in one of two modes: asynchronous mode and demand mode. In
asynchronous mode, both endpoints periodically send Hello packets to each other. If a number of those packets are not received, the session is considered down. In demand mode, no Hello packets are exchanged after the session is established; it is assumed that the endpoints have another way to verify connectivity to each other, perhaps on the underlying physical layer. However, either host may still send Hello packets if needed.
Reference: http://en.wikipedia.org/wiki/Bidirectional_Forwarding_Detection
Q374. Refer to the exhibit.
Which statement about the R1 configuration is true?
A. It supports the service timestamps log uptime command to display time stamps.
B. The logging buffer command was used to increase the default of the buffer.
C. The logging of warning messages is disabled.
D. Log message sequence numbering is disabled.
Answer: D
Explanation:
To disable sequence numbers, use the no service sequence-numbers global configuration command.
This example shows part of a logging display with sequence numbers enableD. 000019: %SYS-5-CONFIG_I: Configured from console by vty2 (10.34.195.36)
In this example we see the absence of sequence numbers on the log messages.
Not A. In this example there are no time stamps or uptimes shown in the logs.
Not B. The default buffer size is 4096 bytes.
Not C. The logging level in this example is informational (level 6), which will display levels 0-6 in the logs. Warnings are level 4.
Q375. Which three protocols support SSM? (Choose three.)
A. IGMPv2
B. IGMPv3
C. IGMP v3lite
D. URD
E. CGMP
F. IGMPv1
Answer: B,C,D
Q376. Which two statements about ERSPAN are true? (Choose two.)
A. It supports jumbo frames of up to 9202 bytes.
B. It adds a 50-byte header to copied Layer 2 Ethernet frames.
C. It supports packet fragmentation and reassembles the packets.
D. It adds a 4-byte header to copied Layer 2 Ethernet frames.
E. Source sessions on an individual switch can use different origin IP addresses.
Answer: A,B
Q377. DRAG DROP
Drag and drop the SNMP element on the left to the corresponding definition on the right.
Answer:
Q378. A GRE tunnel is down with the error message %TUN-5-RECURDOWN: Tunnel0 temporarily disabled due to recursive routing error.
Which two options describe possible causes of the error? (Choose two.)
A. Incorrect destination IP addresses are configured on the tunnel.
B. There is link flapping on the tunnel.
C. There is instability in the network due to route flapping.
D. The tunnel mode and tunnel IP address are misconfigured.
E. The tunnel destination is being routed out of the tunnel interface.
Answer: C,E
Explanation:
The %TUN-5-RECURDOWN: Tunnel0 temporarily disabled due to recursive routing error message means that the generic routing encapsulation (GRE) tunnel router has discovered a recursive routing problem. This condition is usually due to one of these causes:
. A misconfiguration that causes the router to try to route to the tunnel destination address using the tunnel interface itself (recursive routing)
. A temporary instability caused by route flapping elsewhere in the network
Reference: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/22327-gre-flap.html
Q379. Which three statements about GLBP are true? (Choose three.)
A. It uses a virtual MAC address that starts with 0007.b4.
B. It elects a single active virtual gateway to appoint and manage multiple active virtual forwarders.
C. It allows the configured virtual IP address to be used on a physical interface as well.
D. It uses a virtual MAC address that starts with 0070.4b.
E. It elects multiple active virtual gateways to appoint and manage a single active virtual forwarder.
F. Preemption is enabled for the configured active virtual gateway by default.
Answer: A,B,C
Explanation:
The virtual MAC address in GLBP is 0007.b400.xxyy where xx is the GLBP group number and yy is the different number of each gateway (01, 02, 03…). One of the routers in a GLBP group is elected as an AVG – Active Virtual Gateway. There is only one active AVG in a group, and its task is to respond to ARP requests sent to the virtual gateway IP address replying different virtual MAC addresses in response packets. GLBP allows the configured virtual IP address to be used on a physical interface. By default, the GLBP gateway preemptive scheme is disabled. A backup virtual gateway can become the AVG only if the current AVG fails, regardless of the priorities assigned to the virtual gateways.
Q380. When VRF-Lite is configured without BGP support,.which statement about the configuration of the route target and route distinguisher is true?
A. The configuration of the route target and route distinguisher is required.
B. The configuration of the route target and route distinguisher is not required.
C. The configuration of the route target is required and the configuration of the route distinguisher is not required.
D. The configuration of the route target is not required and the configuration of the route distinguisher is required.
Answer: D
