After graduation to become a working dog, the space of the chest bag was getting more and more insufficient, so I tried to find one. There were many styles of bags suitable for hanging on the chest, but the appearances were all different and I didn't want to. Back to the backpack to squeeze the subway itself, I am the most troublesome backpack party on the subway. On the millet official Tmall shop to buy rice lamp, just to see there is a millet chest bag, very simple and large space, so the way to order a single, 69 yuan shipping price is not expensive.
Before the nike shoulder chest bag, excellent buy on the price of cabbage to start.
Millet excellent chest bag packaging, two words, simple.
Unpacking is the body of the chest pack, which is just right for me. The fabric feels good, I am satisfied with the value of color, this is a matter of opinion.
The "MI" logo printed on the cufflinks represents the production of millet. Some people say that millet represents silk. I was scared to hide the millet mobile power supply, the millet plug-in board, and the meter home lamp.
Metal buckles, and nylon straps.
There is a button on both sides of the back, and the user can choose which side of the shoulder to back.
The inside of the back is soft and breathable, but this is not a bright spot. Better backpacks have this feature.
The chest card ID card shows that it is made of polyester fiber.
There is also a small bag hidden on the outside, which can contain pieces of key change and other items.
There are two cufflinks on the big pocket's chain.
The fabric of the interior is sea blue. I don't know this color before buying it. I am not satisfied with this point. If I can choose it, I like red.
A package of MI desiccant is also included.
Inside, there is a small pocket with a zipper and two open slots for mobile phones, Kindle and other items. There is a lot of space and you can even get a bottle of drink and an umbrella.
So, can this bag satisfy my equipment to work? Forcibly insert EDC here.
Sony A25hn player, with a noise reduction plug, can enjoy high-quality singing quietly while squeezing subways every day.
Sony SBH70 Bluetooth headset, sometimes want to watch the video or too much trouble wired headset, use this Bluetooth collar headset, high value, although the sound quality is not A25hn combination high, but listening to the phone inside the song is not bad!
LGG Flex 2 Qu screen phone, Qualcomm Snapdragon 810 processor ... has become a machine, so it is necessary to put into the bag, the main machine inserted pants bag ~
KindlePaperwhite 3, pull a hatred, 300 Jing beans from the Jingdong Da Ledou won the prize, to see the novel to see short text loaded with literature and art.
Millet mobile power 16000mAh, carry charging treasure, just in case.
The summer weather in Guangdong floats and the umbrella is remembered. Lotosblume 10 bone black plastic umbrella, Ma Yun home starting at 65 yuan, a key to open and close, both the wind and rain but also loaded.
Mouthwash, when you go out in the world, if you don't come back in the evening, rely on this gargle and go out.
RIO sugar is also used for fresh breath.
After turning the package over, continue to return to the subject and put the above items in the chest bag of the millet. There is more than enough pressure.
In the end, there was no real show.
Finished drying, thank you for your support!
Classic Ethernet uses a long cable meandering around the building, and this cable connects all the computers. The architecture of classic Ethernet is shown in the following figure "Ethernet":
Physical layer
Each version of Ethernet has a maximum cable length limit (that is, the length that does not need to be amplified). Signals within this range can be transmitted normally, and signals beyond this range will not be transmitted. In order to allow the construction of a larger network, multiple cables can be connected with repeaters. A repeater is a physical layer device that can receive, amplify, and retransmit signals in both directions.
On these cables, the transmission of information uses Manchester encoding.
MAC sublayer
Classic Ethernet uses 1-adhere to the CSMA/CD algorithm, that is, when the station has a frame to send, it must listen to the medium, and send it immediately once the medium becomes free. Monitor whether there are conflicts on the channel while they are being sent. If there is a conflict, immediately terminate the transmission, and send a short conflict enhancement signal, and then wait for a random period of time before resending.
The development of Ethernet is very fast, starting to evolve from the typical Ethernet structure of a single long cable. The problems of a single cable, such as finding out the connection-related problems such as broken or loose locations, have driven people to develop a different type of wiring mode. In this mode, each station has a dedicated wire connected to a central hub. The hub simply connects all the connecting wires electrically, like soldering them together. Hubs cannot increase capacity because they are logically equivalent to classic Ethernet with a single cable. As more and more stations join, the share of fixed capacity shared by each station decreases. Eventually, the LAN will be saturated.
There is another way out to handle the ever-increasing load: switched Ethernet. The core of switched Ethernet is a switch, which contains a high-speed backplane that connects all ports. From the outside, switches look like hubs. They are a box, usually with 4-48 ports, and each port has a standard RJ-45 connector for connecting twisted-pair cables. The switch only outputs the frame to the port where the frame wants to go. A machine can be added or deleted by simply plugging in or unplugging the cable, and since the flaky cable or port usually only affects one machine, most errors are easy to find. This configuration mode still has the problem of a shared component failure, that is, the failure of the switch itself: if all stations lose network connectivity, the IT staff knows how to solve this problem: replace the entire switch.
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