Concept of Network CS 202 1 07 3121101
- Slides: 74
網路概論 Concept of Network 醫務管理暨醫療資訊學系 陳以德 副教授: 濟世CS 202 -1 07 -3121101 轉 2648 -22 itchen@kmu. edu. tw
Simplex, Half-duplex, Full-duplex, Send Receive Simplex Radio, TV Half-duplex walkie-talkie Full-duplex Telephone Receive Send
Computer Networks 4 th, Tanenbaum
OSI v. s. TCP/IP OSI Appliaction Presentation Session Transport Network Data. Link Physical TCP/IP Appliaction none Transport(TCP, UDP) Internet(IP) Network Interface (Ethernet, Token. Ring, FDDI. . . ) http: //www. cs. nthu. edu. tw/~nfhuang/contents. htm
CAT 5, 5 e, 6 Length (m) Speed Bandwidth CAT 5 100 M 100 CAT 5 e 1 G 100 CAT 6 100(55 for 10 G) 1 G, 10 G 250 CAT 6 a 100 10 G 500 CAT 7 100 10 G 600 http: //premiumwires. blogspot. tw/2016/07/cat 5 e-vs-cat 6 e-vs-cat 6 a-vs-cat 7. html
WAN Country, Continent MAN 2 Km~10 Km, City LAN < 2 Km, Campus PAN 10 meters
Communication network ways Communication Client-server Peer-to-peer (P 2 P) Distributed Systems Cloud Computing
Ethernet網路基本概念(2) Hub Switch Hub
Comparison between Hub & Switch Hub Filter Damage or wrong packets × O price Low High Relieving network congestion × O Isolate the problem network card × O Broadcast packets to each node O × Security issues × O
Hub or Switch connect to the other one Hub、Switch串接: 跳線或接Hub上專門的插座 HUB receive send Computer send receive
Ethernet網路基本概念(4) gateway與router:作為銜接兩個不同網路之用 Switch處理MAC address,router處理IP address Internet
Ports • ftp 21 • imap 143 • ssh 22 • http 80 • telnet 23 • https 443 • mail 25 • smtps 465 • DNS 53 • imaps 993 • DHCP server 67 • pop 3 s 995 • DHCP client 68 • SQL Server預設: 1433 • pop 3 110 • SQL Server Browser:UDP 1434 • netbios 137 ~139 • Mysql 3306
IP v 4 32 bits • 140. 117. 13. 244
TCP/IP相關觀念(3) IP Address Net. Mask Description 128. 66. 12. 1 255. 0 128. 66. 12. 0 -255 256台 128. 66. 12. 1=00000001 (只看最後的 1) 255. 0= 0000 (只看最後的 0) ====== 做 and 0000 mask後=xxxx 163. 151. 180, 163. 151. 1 在 subnetmask: 255. 192 163. 15. 310. 28
Subnetmask (netmask) 130. 97. 16. 132 255. 192 130. 97. 16. 128 -191 64台 132= 10000100 192 = 11000000 210. 202. 191. 195=11000011 255. 240 210. 202. 191. 192 -207 16台 240=11110000 mask=1100 xxxx 61. 134. 176. 29 29=00011101 18. 20. 16. 91 mask=10 xxxxxx 255. 248 61. 134. 176. 24 -31 8台 248=11111000 mask=00011 xxx 255. 0. 0 18. 20. x. x 65536台
IP v 6 128位元 • 135. 75. 43. 52 -> (十六進位為 0 x 874 B 2 B 34) 0000: 0000: ffff: 874 B: 2 B 34
… IPv 4 位址. . . : 192. 168. 1. 101(偏好選項) 子網路遮罩. . . : 255. 0 租用取得. . . : 2018年 3月25日 下午 09: 21: 35 租用到期. . . : 2018年 3月26日 下午 09: 21: 35 預設閘道. . . : 192. 168. 1. 1 DHCP 伺服器. . . : 192. 168. 1. 1 DHCPv 6 IAID. . . : 57988149 DHCPv 6 用戶端 DUID. . . . : 00 -01 -21 -9 D-7 A-96 -74 -D 4 -35 -F 6 -0 C-A 4 DNS 伺服器. . . : 192. 168. 1. 1 Net. BIOS over Tcpip. . . . : 啟用 通道介面卡 Teredo Tunneling Pseudo-Interface: 連線特定 DNS 尾碼. . . . : 描述. . . . : Teredo Tunneling Pseudo-Interface 實體位址. . . : 00 -00 -00 -00 -E 0 DHCP 已啟用. . . : 否 自動設定啟用. . . : 是 IPv 6 位址. . . : 2001: 0: 9 d 38: 90 d 7: 2807: 1 f 81: 3 f 57: fe 9 a(偏好選項) 連結-本機 IPv 6 位址. . . . : fe 80: : 2807: 1 f 81: 3 f 57: fe 9 a%6(偏好選項) 預設閘道. . . : : : DHCPv 6 IAID. . . : 352321536 DHCPv 6 用戶端 DUID. . . . : 00 -01 -21 -9 D-7 A-96 -74 -D 4 -35 -F 6 -0 C-A 4 Net. BIOS over Tcpip. . . . : 停用
RS-232, 422, 485 Specifications 傳輸速度 作模式 RS-232 1200, 2400, 9600, 19200, 115200 單端點 驅動器與接收器總數 1 Driver, 1 Receiver Cable最大長度 50 ft (2500 p. F) RS-422 RS-485 10 MBit/s 差動 1 Driver, 10 Receiver 40 ft 差動 32 Driver, 32 Receiver 40 ft 兩個半雙 的EIA-485(RS-485)構成一個全雙 的EIA-422
USB 電壓 5 V USB 3. 2 頻寬 20 Gbps 理論速度 2 GB/s 最大電流 5 A USB 3. 1 Gen 2 USB 3. 1 Gen 1 10 Gbps 5 Gbps 1280 MB/s 5 A 640 MB/s 5 A USB 3. 2 Type-C不分正反面 USB 2. 0 USB 1. 1 480 Mbp 12 Mbps s 60 MB/s 1. 5 A 500 m. A
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2017 TWNIC 行動首次超越ADSL https: //www. twnic. net. tw/download/200307/20170721 c. pdf
2017年
2017 年台灣寬頻網路使用調查報告 https: //www. twnic. net. tw/download/200307/20170721 e. pdf
2017 年台灣寬頻網路使用調查報告 https: //www. twnic. net. tw/download/200307/20170721 e. pdf
http: //map. twnic. net. tw
TWAREN台灣高品質學術研究網路 美加地區, OC-1, 2, . . . , OC-192 其他地區, STM-1, 4, 64等 OC-1=51. 84 Mbps OC-3=STM-1=51. 84 x 3=155. 52 M OC-12=STM-4=51. 84 x 12= 622. 08 M OC-48=STM-16=51. 84 x 48=2488. 32 M OC-192=STM-64=51. 84 x 192= 9953. 28 M 光纖(Fiber)傳輸 OC = Optica Carrier http: //www. twaren. net
http: //mrtg. twaren. net/mrtg
http: //www. hinet. net/footer_aboutus. htm#g
HTML
其他網頁語法 SGML XML CGI, Servlets PHP ASP, ASP. net JSP, Java. Script, j. Query, VB script Flash
Security 攻擊 Attacks Malware (viruses, worms, Trojan horses, spyware, phishing software) Denial of service Spam 保護 Protection Firewalls, Antivirus software Spam filters, Proxy Servers Encryption, Authentication, Digital Signature
參考資料 http: //svn. openfoundry. org/scorm/cs/Designing. SCOs http: //itchen. class. kmu. edu. tw/HTML/content. htm http: //www. cs. nthu. edu. tw/~nfhuang/contents. htm
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