Explanation/Reference:
Explanation:
At a basic level,roamingin an enterprise IEEE 802.11 network occurs when an IEEE 802.11 client changes its access point (AP) association from one AP to another AP within the same WLAN. Depending on client capabilities, an 802.11 WLAN client may roam on the same WLAN between APs within the same frequency band or between the 2.4 GHz and 5 GHz frequency bands. Smartphones and tablets that have simultaneous cellular and Wi-Fi connections may seamlessly roam across networks provided there is a suitable infrastructure network design. When a clientroams from a WLAN with one service set identifier (SSID) to a WLAN with another SSID, the roam will not be seamless. The Wi-Fi client logic maintains only one Wi-Fi WLAN authentication at a time.
Reference:http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/RToWLAN/ CCVP_BK_R7805F20_00_rtowlan-srnd/CCVP_BK_R7805F20_00_rtowlan-
srnd_chapter_0101.html#CCVP_RF_R0D3C4EC_00