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Network Design & Management - Coggle Diagram

- - - - Network access devices - Hub, Switches, Access points
        
        Internetwork devices - connect network to network, Routers
        
        Communication servers - wireless broadband
        
        Modems - Telephone or Cable
        
        Security devices - monitoring network traffic
      - Network Media
        
        Copper, Fiber Optics, Wireless
- - - - base on Port 53
        
        TCP - Connection-Oriented
        
        UDP - Connectionless
    - - base on TCP Port 80
        
        URL
        
        message
        
        GET - ส่งไปไหน ร้องขอไฟล์ไร
        
        POST - ส่ง msg save
        
        PUT - ส่ง msg bigger
    - - SMTP (TCP Port 25) - send mail to server MDA
        
        POP (UDP Port 110) - send mail to client MUA
        
        Processes
        
        MTA หาเส้นทาง
        
        MDA mail filter
        
        Command
        
        HELO - identifies SMTP to server
        
        EHLO - check version
        
        MAIL FROM - idenfies sender
        
        RCPT TO - idenfies receiver
        
        DATA - identifies body of msg
    - - TCP Port 20 - ส่งข้อมูล
        
        TCP Port 21 - สร้างเส้นทาง
    - - UDP Port 67
        
        Assign IP address, Subnet mask, gate-way
        
        Choose address in pool
    - - File-Sharing
        
        Linux call SAMBA
    - - P2P
    - - Not save
        
        Saver
        
        Secure Shell SSH
- - - - IANA assigns port number
        
        Well-known ports 0 - 1023, สากล
        
        Registered ports 1024 - 49151, กำหนดเอง
        
        Dynamic / Private ports 49152 - 65535, VPN
  - - - Session Termination
        Finish sending
      - Retransmission
        Resent miss acknowledgment
- - - - แบ่งตาม
        
        Geographically แบ่งพื้นที่
        
        Specific Purpose - แต่ละกลุ่มการใช้ข้อมูลต่างกัน
        
        Ownership - private group
- - - - แต่ละส่วนเรียก octet
  - - - Check address, Mapping IP to MAC
        
        Request address
        
        Router local network but Switch broadcasting
        
        Directed broadcast 203.15.5.255 host to host, host portion is 1
        
        Limited broadcast 255.255.255.255 limited in host not out router
    - - Video and audio braodcast
        
        Multicast clients - receiver host, can Multicast group
        
        IP from 224.0.0.0 to 239.255.255.255
        
        Administratively scoped addresses / Limited-scope addresses check network traffic
        
        Network Time Protocol (NTP) for data center(cluster) by synchronize the time-of-day
        
        2 type
        
        Reserved link-local addresses
        
        Globally scoped addresses
  - - - Host Range - slash format
        
        Network 172.16.4.0/24
        
        32-24 = 8
        
        2^8 = 256
        
        256-2 = 254
      - Find network address
        
        Host ⊕ Mask
      - Public Addresses
        
        Private Addresses can public by NAT in router or firewall
        10.0.0.0 | 172.16.0.0 | 192.168.0.0
  - - - Address 00, 01, 10, 11
        Mask .11000000
    - - Network diagram, Spreadsheet
        
        ดู total number of addresses
        
        แต่ละวงต้องการเท่าไหร่
        
        แบ่ง subnet จากที่ใหญ่สุดก่อน ไปเล็กสุด
        
        Example
        
        IP 172.16.0.0/22 Needs 800 hosts in its four location and the WAN connection by HQ 500, HR 50, Sales 200, legal 20
        
        Step1 find total number of addresses
        
        Host tange of 22 is (2^10) - 2 = 1022
        
        1 more item...