Author: examcert

An Ethernet switch may use a buffering technique to store frames before forwarding them. Buffering may also be used when the destination port is busy because of congestion. The switch stores the frame until it can be transmitted. As shown in Table 35-1, there are two methods of memory buffering. Table 35-1 Memory Buffering Methods…

Switch Speeds and Forwarding Methods (35.2) Switches may have the capability to implement various forwarding methods to increase performance. Frame Forwarding Methods on Cisco Switches (35.2.1) As you learned previously, switches use their MAC address tables to determine which port to use to forward frames. With Cisco switches, there are actually two frame forwarding methods…

Cisco LAN Switches (35.1.2) When a LAN grows to the point where the four Ethernet ports provided by the wireless router are not enough for all of the devices that need to attach to the wired network, it is time to add a LAN switch to the network. A switch can provide connectivity at the…

Objectives Upon completion of this chapter, you will be able to answer the following questions: Key Terms This chapter uses the following key terms. You can find the definitions in the Glossary.automatic medium-dependent interface crossover (auto-MDIX)cut-through switchingfast-forward switchingfragment-free switchingstore-and-forward switching Introduction (35.0) I’m back! Halimah told me that she has been given her first assignment….

Summary (33.6) The following is a summary of each topic in the chapter and some questions for your reflection. What Did I Learn in This Chapter? (33.6.1) • IPv6 Address Types—There are three types of IPv6 addresses: unicast, multicast, and anycast. IPv6 does not use the dotted-decimal subnet mask notation. Like IPv4, the prefix length…

This section introduces the two types of IPv6 multicast addresses: well-known multicast and solicited-node multicast addresses. Assigned IPv6 Multicast Addresses (33.5.1) Earlier in this chapter, you learned that there are three broad categories of IPv6 addresses: unicast, anycast, and multicast. This section goes into more detail about multicast addresses. IPv6 multicast addresses are similar to…

Depending upon the operating system, a device may use a randomly generated interface ID instead of using the MAC address and the EUI-64 process. Beginning with Windows Vista, Windows uses a randomly generated interface ID instead of one created with EUI-64. Windows XP and previous Windows operating systems used EUI-64.After the interface ID is established,…

EUI-64 Process vs. Randomly Generated (33.3.5) When the RA message is either SLAAC or SLAAC with stateless DHCPv6, the client must generate its own interface ID. The client knows the prefix portion of the address from the RA message, but must create its own interface ID. The interface ID can be created using the EUI-64…

Method 1: SLAAC (33.3.2)Stateless Address Autoconfiguration (SLAAC) is a method that allows a device to create its own GUA without the services of DHCPv6. Using SLAAC, devices rely on the ICMPv6 RA messages of the local router to obtain the necessary information.By default, the RA message suggests that the receiving device use the information in…

Dynamic Addressing for IPv6 GUAs (33.3)This section discusses the different methods of how a device can automatically create or receive an IPv6 GUA.RS and RA Messages (33.3.1)If you do not want to statically configure IPv6 GUAs, no need to worry. Most devices obtain their IPv6 GUAs dynamically. This topic explains how this process works using…