12. Which of the following configurations applies VLAN 25 to FastEthernet interface 0/3?
a.
conf tinterface f0/1switchport mode trunkvlan 25b.
conf tinterface f0/3switchport mode accessc.
conf tswitchport access vlan 25d.
conf tinterface f0/4Foundation Topics
The Wireless Network Road Trip
At this point, you already have an understanding of how frames are sent on a wireless net-
work. In the Cisco Unified Wireless Network, frames do not stay on the wireless network;
rather, they travel from a lightweight AP to a wireless LAN controller (WLC). The WLC
and lightweight APs are discussed in Chapter 10, “Cisco Wireless Networks Architec-
ture.” The purpose of this chapter is to familiarize you with how traffic is kept separate as
it travels from the AP to the WLC and then to the wired network. To better understand
this process, you must understand how a network typically looks and the process that
each device uses to send and receive data.
The Association Process
To begin, you need a network. This chapter uses the common logical topology seen in
Figure 9-1. As you can see, multiple wireless clients are in range of an AP that is advertis-
ing multiple service set identifiers (SSID). One SSID puts users on a network that is of-
fered to guest users called Guest. The other SSID is called UserNet and is designed for
authenticated users of the corporate network. Naturally, more security is going to be ap-
plied to users of UserNet, such as authentication and encryption, as opposed to the net-
work Guest. The Guest network places users on the 172.30.1.0/24 subnet. The UserNet
places users on the 10.99.99.0/24 network. Although these two networks are on different
subnets and users associate with different SSIDs, recall that an AP can advertise multiple
SSIDs but actually uses the same wireless radio. In the wireless space, the SSID and IP
subnet keep the networks logically separated.
Client BGuest UserMAC: AAAA.BBBB.CCCC
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