DATA LINK LAYER WIRED NETWORKS
WIRED LANS ETHERNET PROTOCOL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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FF-FF-FF-FF-FF-FF
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5C-26-0A-4B-19-3E
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01-00-5E-00-00-03
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00-26-0F-4B-00-3E
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Detailed explanation-1: -Any MAC address starting with “01:00:5e” is IPv4 multicast MAC address. We have already learned that IP addresses are used in layer 3 (network layer) of TCP/IP protocol stack.
Detailed explanation-2: -IANA Multicast 48-bit MAC Addresses These values are prefixed with 01-00-5E.
Detailed explanation-3: -What type of address is 01-00-5E-0A-00-02? The multicast MAC address is a special value that begins with 01-00-5E in hexadecimal. It allows a source device to send a packet to a group of devices.
Detailed explanation-4: -And it target mac address is the UNKNOW (00:00:00:00:00). This is called “ARP Cache Validation” packet means ARP timeout has expired and switch wants to try the validation the same “is this ARP validate with the same IP".