READ Free Dumps For Cisco- 640-554
| Question ID 22143 | What can be used as a VPN gateway when setting up a site-to-site VPN?
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| Option A | Cisco Catalyst switch
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| Option B | Cisco router
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| Option C | Cisco Unified Communications Manager
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| Option D | Cisco AnyConnect
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| Correct Answer | B |
Explanation
| Question ID 22144 | Which type of Layer 2 attack makes a host appear as the root bridge for a LAN?
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| Option A | LAN storm
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| Option B | MAC address spoofing
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| Option C | MAC address table overflow
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| Option D | STP manipulation
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| Option E | VLAN attack
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| Correct Answer | D |
Explanation STP is a Layer 2 protocol that ensures a loop-free topology. STP operates by electing a root bridge and building a tree topology from that root. STP allows for redundancy, but at the same time, ensures that only one link is operational at a time and no loops are present. Network attackers can manipulate STP to conduct an attack by changing the topology of a network. An attacker can make it appear that the attacking host is a root bridge, thereby spoofing the root bridge. All traffic for the immediate switched domain then passes through the rogue root bridge (the attacking system).