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Trunk interface -- port security

Question: Is there any advantage of configuring port security on a switchport that is configured as a trunk? i was going through the cisco lab book and it asks "why should port security be enabled on switch trunk ports?" can't seem to think of anything...

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Multicast and Unicast in Ospf

Question: I am currently studying OSPF and I got confused by reading the book (Foundation Guide) and then aplying what learned to my 3-layer switch WS-C3560X-48T-L. The book refers that Update and ACK packets are sent to multicast address alongside with...

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Cisco ospf process ID

Question: I'm confused on the role that process IDs play in the configuration. What is their significance? All of the study material I've reviewed thus far seem to imply that their value isn't all that critical. Answer: The OSPF process-id is a numeric...

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Startup config file on cisco 3560x

Question: I have a WS-C3560X-24T-L switch in my CCNP that I have configured already and its working as I wanted. The issue that I am facing is that I have got an another swith,I want this one to be exact replica of what I have in place right now. I have...

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How to choose a DR & BDR

Question: In a topology i implemented OSPF having 4 3-layer switch(like WS-C3750X-24T-L) connected. A, B, C and D named router. can u help me determining the Designated Router and BDR.? list Router ID of A, B, C & D ? and describe types of LSA's being...

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The way to control MAC flooding attack?

Question: Port security is the only control method for MAC flooding attack? Answer: To prevent MAC flooding attacks, network operators usually rely on the presence of one or more features in their network equipment: With a feature often called "port security"...

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Quick question about DHCP relay

Question: Quick question about DHCP relay. I understand the concept of DHCP relay, but what I don't understand is how does the DHCP server know what IP addresses to lease to each VLAN/subnet relayed to it? For example: let's say that a relay is relaying...

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Storm controll and unicast flooding

Question: What is the difference between storm controll and unicast flooding? Also, why is unicast flooding called "unicast" if it refers to multicast as well? I know the second questions is picky but just wanted to hear opinoons on it. Answer: Storm...

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Cisco acl to ftp server

Question: I have setup the following ACL to forward all FTP connections to an internal server but can't connect. I have applied it to the outside interface. Is there a problem with the ACL? access-list 101 remark Forwarding FTP to 192.168.1.25 access-list...

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