To enable Name Resolution, navigate to View | Name Resolution | Enable for Network Layer (click to turn on the checkmark) and make sure Use External Network Name Resolver is enabled as well. Wireshark will attempt to resolve all the IP addresses in the capture to their hostname or website address, and the resolved names will then appear (replacing the previous IP addresses) in the packet list as well as the Conversations window. Note that the Name Resolution option at the bottom of the Conversations window must be enabled as well (it usually is by default), and this setting affects whether resolved names or IP addresses appear in the Conversations window (if Name Resolution is enabled in the Wireshark main screen), as shown in the following screenshot: