CSDN
Latest recorded position: #16 on Jul 21, 2026, 10:48 AM CST.
There are not enough retained observations to calculate a rank change.
How the data link layer uses the MAC address to mark the "ID card" of each device, limits the size of 46-1500 byte data frames through MTU rules, and the ARP protocol to accurately address in broadcast storms, solving the "last mile" problem from IP to MAC
数据链路层如何用MAC地址标记每台设备的“身份证“，通过MTU规则限制46-1500字节数据帧大小，ARP协议在广播风暴中精准寻址，解决IP到MAC的“最后一公里“难题
ThreadEast first recorded "How the data link layer uses the MAC address to mark the "ID card" of each device, limits the size of 46-1500 byte data frames through MTU rules, and the ARP protocol to accurately address in broadcast storms, solving the "last mile" problem from IP to MAC" on Jul 21, 2026, 10:48 AM CST. It has been observed on CSDN, with less than one hour between the first and latest recorded appearances.
What the trend data tells us
The English title describes the topic of the source listing. Its appearance in a ranking measures attention within that platform; the ranking alone does not explain the cause of a spike or verify the underlying claim.
This stable URL remains available after a topic leaves a live ranking. Observation span is elapsed time between sightings, not continuous time on a chart. Platforms use different ranking and heat systems; their metrics are not added together.
Original evidence
Source listings
CS
#16Source metric: 7670
Original source