Which three statements about the Cisco IPS sensor are true? (Choose three.)
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A. B. C. D. E.ACE.
The Cisco Intrusion Prevention System (IPS) is a security technology designed to monitor network traffic for signs of malicious activity and prevent attacks before they can harm the network. The IPS sensor is a key component of the system, responsible for analyzing network traffic and detecting potential security threats. Here are the explanations for the given statements:
A. You cannot pair a VLAN with itself. This statement is true. When creating an inline VLAN pair on a sensing interface, you cannot pair a VLAN with itself. This is because the VLAN pair is designed to forward traffic between two different VLANs, not within the same VLAN.
B. For a given sensing interface, an interface used in a VLAN pair can be a member of another inline interface pair. This statement is true. The Cisco IPS sensor allows you to configure multiple inline interface pairs on a single sensing interface. This means that an interface used in a VLAN pair can also be a member of another inline interface pair.
C. For a given sensing interface, a VLAN can be a member of only one inline VLAN pair, however, a given VLAN can be a member of an inline VLAN pair on more than one sensing interface. This statement is true. A given VLAN can only be a member of one inline VLAN pair on a specific sensing interface. However, the same VLAN can be a member of an inline VLAN pair on multiple sensing interfaces.
D. The order in which you specify the VLANs in an inline pair is significant. This statement is true. The order in which you specify the VLANs in an inline pair is significant because it determines the direction of traffic flow. The first VLAN in the pair is the ingress VLAN, and the second VLAN is the egress VLAN. Traffic flows from the ingress VLAN to the egress VLAN, and any security policies or rules are applied in this direction.
E. A sensing interface in inline VLAN pair mode can have from 1 to 255 inline VLAN pairs. This statement is true. The Cisco IPS sensor allows you to configure from 1 to 255 inline VLAN pairs on a single sensing interface. This provides flexibility in configuring the system to meet the needs of different network environments.