Ccna certification Practice Tests

305

 173.  B.  You should configure a trunk port on the switch so that several different VLANs can 

be tagged and carried over the link. This will allow the forwarding of both voice and 

data, with expansion for other applications in the future. An access port will only allow 

one VLAN of traffic and you would need a separate access port for each type of traffic, 

eventually running out of physical ports. Although this setup sounds like a voice port 

would fit the application, a WLC does not have the ability to use a voice port. A routed 

switch port is nothing more than an interface on the switch with an IP address for routing 

purposes.

 174.  C.  Link Aggregation (LAG) must be used between the WLC and the switch, regardless of 

the brand. Wireless LAN controllers do not support the use of LACP or PAgP; they only 

support vanilla EtherChannel configurations, also known as LAG. PortChannel is a term 

synonymous with Cisco devices only.

 175.  B.  When a LAG is created between a switch and a WLC, the method of load balancing 

used is hash-based, using layer 4 source and destination ports. Round robin load 

balancing cannot be configured on the WLC or switch side of a LAG. First in, first out 

(FIFO) is a buffer mechanism used to send data out as it comes in, and it is not used in 

load balancing scenarios. Spill and fill is a method of saturating one link before the other 

link is used; it is not used in load balancing scenarios.