data collation

"Data Collation" Cisco [OSI, IP Address, Network Segment, Subnet Mask]### concept ###----------------------from 20110712 to 201107161.network segment{ Router;switch;bridge;} 2.lan blocks{broadcast domain;broadcast  storm;multicast;low brandwidth;} 3.

"Data Collation" Cisco [STP]STP{STP802.1D--------------sh mac address-table sh int vlan 1sh  Spanning-treestate: blocking, listening, learning, forwarding, disabledswitch (config) #int  f0/1switch (config-if) #switchport

"Data Collation" Cisco [NAT, Pat]Nat{a (config) #ip  nat pool GlobalNet 171.16.10.50 171.16.10.55 netmask  255.255.255.0A (config) #access-list 1 permit 192.168.20.0 0.0.0.255a (config) #access-list  1 permit 192.168.30.0 0.0.0.255a (config) #ip

"Data Collation" Cisco [CLI, Static, RIP, EIGRP, OSPF]3.CLI{1) Set password, interface IP address router>router>enablerouter#router#configure terminalrouter (config) # Hostname aa (config) #enable  secret apwda (config) #interface  fastethernet 0/1a

"Data Collation" Cisco [ACL]Access-list{1)  Standard access list: range:  (1 to 99)  check:  Ipusage: access-list access-list-number {permit|deny} source [wildcard-mask]test  conditions: Check all the address bits  (Match all) an ip 

"Data Collation" Cisco [Shell, Command]Promot mode{user mode:router> (input: enable) privilege mode:router# (input:conf t) Global config mode:router (Config) #----ctrl-z -> pm, exit ->  Gcminterface:router (config-if) #Sub-interface:router

"Data Collation" Cisco [VLAN]VLAN{ISL (Inter-switch link) 802.1qVTP (vlan trunking protocol): server, client,  transparent# build VlanS1 (config) #vlan  2s1 (Config-vlan) #name  saless1 (config) #vlan  3s1 (Config-vlan) # name marketing# assigning

There are several core objects in NiO that need to be mastered: buffer, channel, selector (Selector).Buffer buffersBuffer is actually a container object, more directly, is actually an array, in the NIO library, all the data are processed in buffer.

Some of the details about the buffer are described in the previous article, and it is now finally possible to get into the most interesting parts of NiO that are non-blocking I/O. Typically, when synchronizing I/O operations, if the data is read,

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Data preprocessing 1, data Audit: Check the data for errorsRaw data-Integrity: Whether the object being investigated is missing.Accuracy: Data is error, abnormal value existsOutliers: Record errors, correct them, correct values, and keep

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