CCNP 300-115 Q479 請高人解答

aa8538

Which two statements about the monitoredtraffic in a SPAN session are true? (Choose two.)

A. You cannot configure two separate SPANor RSPAN source sessions with separate or overlapping

sets of SPAN source ports and VLANs

B. By default, all monitored packets arecaptured without the IEEE 802.1Q tag

C. Egress SPAN monitors packets sent by thesource interface before any QoS modifcations

D. Sources can be ports or VLANs or anycombination in the same session

E. By default, all monitored packetsinclude the IEEE 802.1Q tag that they had on the source port

F. Ingress SPAN monitors packets receivedby the source interface before any QoS modifications

有人知道這題確定的答案嗎??

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題庫答案為 C,D   但我看到其他題庫為 B,F

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因相差過大故發問

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求大神分享

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听风笑

A选项：不能重叠（所以错）；B选项：端口一般都含VLAN标记，此处用 ALL（所有）错了，太绝对；C选项，在任何QoS修改之前，出站的SPAN监听包是由源端口发出，肯定是对的，毫无疑问，总不可能是目的端口；D选项：SPAN源可以是端口或vlan在同一会话中的任何组合，你可以监视一个端口，也可以监视多个，命令是这样的：monitor session 1 source interface fa0/3,fa0/5,fa0/6 - 24 ；同理VLAN也一样，但是如果中间不是或而是和，那就错了，VLAN和端口不能再一个会话中，只能用一种。E选项，源是VLAN，是不存在802.1Q标签的，port不等同于interface，port可以是interface，也可以是VLAN，VLAN的端口叫SVI;F选项：SPAN监听包是由源端口发出，由目的端口接收，不用去介意进站和出站，容易把你搞晕。所以错误。

a50716575

Answer: B, F
, e+ K9 n/ V% `) DExplanation:
Receive (Rx) SPAN: Receive (or ingress) SPAN monitors as much as possible all of the packets received by the source interface or VLAN before any modification or processing is performed by the switch.
Transmit (Tx) SPAN: Transmit (or egress) SPAN monitors as much as possible all of the packets sent by the source interface after all modification and processing is performed by the switch.
0 d( L5 l+ P% y6 K; ZYou cannot mix source ports and VLANs in a single session.

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willy00029

thank you very much

alubagodcome

1 E. B2 Q+ @% P0 ?# h/ gcongrats and thanks for sharing

evelyn0917

感謝其他神人的解答
上了一課

cisco1463

congrats and thanks for sharing

001phoenix

谢谢分享

nario

thanks for sharing