ccna what to study

ccna what to study.As you can see from this example, the switch sent and received the VTP summary advertisements.Video 12.01 A multimedia demonstration of configuring and verifying VTP on the switch is included in the companion digital resource to this book.12.4.2 Configuring a Trunk ConnectionThis section describes how to establish a trunk connection on the switch using the 802.1Q trunking protocol. However, before proceeding with the configuration, you need to be familiar with a protocol used to establish a trunk connection between devices: the Dynamic Trunking Protocol (DTP).0 One limitation of trunk connections is that you cannot use the port security and 802.1X authentication features that are used for access links.1.Dynamic Trunking Protocol (DTP)Cisco's proprietary trunking protocol is used to dynamically establish trunk connections.DTP is used to dynamically establish and verify trunk connections between Cisco switches. it supports five trunk modes as shown in Table 12.4.If the interface's trunk mode is set to on or trunk, it generates DTP messages and tags the frames according to the trunk type (802.1Q on the 2960 switch). When set to on, the trunk port always assumes that the connection is a trunk connection, even if the other end of the connection does not support trunking. Some Cisco switches (such as the 2960 Switch) use the term trunk instead of onQTable 12.4 DTP Modes and How They WorkIf the trunk mode is set to desirable, the interface will generate a DTP message, but assume that the other end does not have trunking capability and wait for its DTP answer message. In this mode, the interface is initially an access link connection; if the remote end sends a DTP message indicating that it supports trunking, a trunk connection will be established and tagging of frames on the interface will begin. If the other end does not support trunking, the interface will remain an access link connection.If the relay mode is set to auto, the interface will passively listen for DTP messages sent from the remote end and remain as an access link connection. If the interface receives a DTP message and the message matches its trunking capability, the interface will switch from an access link connection to a trunk connection and begin tagging frames. This is the default DTP mode for Cisco switch interfaces that support trunking.