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Question No: 8
Whatu2021s uRPF checking first when the packet enters the interface ? or when unicast reverse patch forwarding is configured on interinterface.
A. it check the ingress access list
B. it check the egress access list
C. Route available in FIB ot it verifies a reverse patch via the fib to the source
D. it verify that the source has a
Answer: C
Question No: 9
Which command do you enter to display log messages with a timestamp that includes the length of time since the device was last rebooted?
A. service timestamps log uptime
B. logging facility 20
C. service timestamps debugging localtime msec
D. logging console errors
E. logging monitor 7
F. service timestamps log datetime msec
Answer: A
Question No: 10
If the total bandwidth is 64 kbps and the RTT is 3 seconds, what is the bandwidth delay product?
A. 8,000 bytes
B. 16,000 bytes
C. 24,000 bytes
D. 32,000 bytes
E. 62,000 bytes
Answer: C
Question No: 11
What are the four main steps in configuring a GRE tunnel over IPsec on Cisco routers? (Choose Four)
A. Configure a physical interface or create a loopback interface to use as the tunnel endpoint.
B. Create the GRE tunnel interfaces.
C. Add the tunnel interfaces to the routing process so that it exchanages routing updates across that interface.
D. Add the tunnel subnet to the routing process so that it exchanages routing updates across that interface.
E. Add all subnets to the crypto access-list, so that IPsec encrypts the GRE tunnel traffic.
F. Add GRE traffic to the crypto access-list, so that IPsec encrypts the GRE tunnel traffic.
Answer: A,B,D,F
Question No: 12
Which two statements about configuring Frame Relay point-to-multipoint connections are true? (Choose two)
A. They ignore the broadcast keyword in the frame-relay DLCI mapping.
B. They require the same DLCI on each side of the link.
C. Changing a point-to-multipoint subinterface to a different type requires the interface to be deleted and recreated.
D. They require the frame-relay mapping command to be configured.
E. They require inverse ARP.
Answer: D,E
Question No: 13
Which three are characteristics of IPv6? (Choose three.)
A. An IPv6 address is 128 bits long.
B. An IPv6 header is 20 bits long.
C. An IPv6 header contains the next header field.
D. An IPv6 header contains the protocol field.
E. IPv6 routers send RA messages.
F. An IPv6 header contains the header checksum field.
Answer: A,C,E
Explanation:
All IPv6 addresses are 128 bits long to accommodate a far larger number of stations than what was possible with the 32 bit IPv4 addresses.
The following displays the IPv6 header field in detail: IPv6 header:
Version. 4 bits.IPv6 version number.
Traffic Class. 8 bits.Internet traffic priority delivery value.
Flow Label. 20 bits.Used for specifying special router handling from source to destination(s) for a sequence of packets.
Payload Length. 16 bits unsigned.Specifies the length of the data in the packet. When cleared to zero, the option is a hop-by-hop Jumbo payload.
Next Header. 8 bits.Specifies the next encapsulated protocol. The values are compatible with those specified for the IPv4 protocol field.
Hop Limit. 8 bits unsigned.For each router that forwards the packet, the hop limit is decremented by 1. When the hop limit field reaches zero, the packet is discarded. This replaces the TTL field in the IPv4 header that was originally intended to be used as a time based hop limit.
Source address. 16 bytes.The IPv6 address of the sending node. Destination address. 16 bytes.The IPv6 address of the destination node.
Question No: 14
Which two reductions are the correct reductions of the IPv6 address 2001:0d02:0000:0000:0014:0000:0000:0095? (Choose two)
A. 2001:0d02:::0014:::0095
B. 2001:d02::14::95
C. 2001:d02:0:0:14::95
D. 2001:d02::14:0:0:95
Answer: C,D
Explanation:
We canu2021t use triple colons (:::) in IPv6 presentation. Also We canu2021t use double colons (::) twice. You can use it only once in any address because if two double colons are placed in the same address, there will be no way to identify the size of each block of 0s. Remember the following techniques to shorten an IPv6 address:
- Omit leading 0s in the address field, so :0000 can be compressed to just :0 and :0d02 can be com-pressed to :d02 (but :1d00 can not be compressed to :1d)
- Use double colons (::), but just once, to represent a contiguous block of 0s, so 2001:0d02:0000:0000:0014:0000:0000:0095 can be compressed to 2001:0d02::14:0:0:95 or 2001:0d02:0:0:14::95
Question No: 15
Which of the following NSAP addresses is a private, locally administered address?
A. 39.0f01.0002.0000.0c00.1111.00
B. 48.0f01.0002.0000.0c00.1111.00
C. 49.0004.30ac.0000.3090.c7df.00
D. 52.0f01.0002.0000.0c00.1111.00
Answer: C
Question No: 16
Which two statements about AAA implementation in a Cisco router are true? (Choose two.)
A. RADIUS is more flexible than TACACS+ in router management.
B. RADIUS and TACACS+ allow accounting of commands.
C. RADIUS and TACACS+ encrypt the entire body of the packet.
D. RADIUS and TACACS+ are client/server AAA protocols.
E. Neither RADIUS nor TACACS+ allow for accounting of commands.
Answer: B,D
Question No: 17
Which three IP SLA performance metrics can you use to monitor enterprise-class networks? (Choose three.)
A. PAcket loss
B. Delay
C. bandwidth
D. Connectivity
E. Reliability
F. traps
Answer: A,B,D
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