Latest CCIE 350-001 New Question (41-45)

QUESTION 41
Which two are effects of connecting a network segment that is running 802.1D to a network segment that is running 802.1w? (Choose Two.)
A.    the entire network switches to 802.1D and generates BPDUs to determine root bridfe status.
B.    A migration delay of three seconds occurs when the port that is connected to the 802.1D bridge  comes up
C.    The entire network reconverges and a unique root briddge for the 802.1D segment, and a root bridge  for the 802.1W segment, is chosen
D.    the first hop 802.1w switch that is connected to the 802.1D runs entirely in 802.1D compatibility mode  and converts the BPDUs to either 802.1D or 802.1W segments of the network
E.    Classic 802.1D timers, Such as forward Delay and Max-age, will only be used as a backup, and will  not be necessary if point-to-point links and edge prots are properly identified and set by the administrator.
Answer: BD

QUESTION 42
Which command is used to enable Etherchannel hashing for layer 3 IP and Layer 4 Port-based CEF?
A.    mpls ip cef
B.    port-channel ip cef
C.    mpls ip port-channel cef
D.    port-channel load balance
E.    mpls ip load-balance
F.    ip cef etherchannel channel-id XOR L4
G.    ip cef connection exchange
Answer: D

QUESTION 43
In 802.1s, how is the VLAN to instance mapping represented in the BPDU?
A.    The VLAN to instance mapping is a normal 16-byte field in the MST BPDU.
B.    The VLAN to instance mapping is a normal 12-byte field in the MST BPDU.
C.    The VLAN to instance mapping is a 16-byte MD5 signature field in the MST BPDU.
D.    The VLAN to instance mapping is a 12-byte MD5 signature field in the MST BPDU.
Answer: C

QUESTION 44
Which three combinations are valid LACP configurations that will set up a channel? (Choose three.)
A.    On/On
B.    On/Auto
C.    Passive/Active
D.    Desirable/Auto
E.    Active/Active
F.    Desirable/Desirable
Answer: ACE

QUESTION 45
Refer to the exhibit. Which statement is correct about the prefix 160.0.0.0/8?
A.    The prefix has encountered a routing loop.
B.    The prefix is an aggregate with an as-set
C.    The prefix has been aggregated twice, once in AS 100 and once in AS 200.
D.    None of these statements is true.
Answer: B