Bluetooth chat

Bluetooth Chat

Bluetooth Chat


Bluetooth Pairing


Bluetooth Pairing

    Bluetooth Device Scanner

      Comments

      Post a Comment

      Popular posts from this blog

      Classful Subnetting and IPv4 Subnet Masks

      Image
      Classful Subnetting Very specific subnetting architecture Not used since 1993 But still referenced in casual conversation Used as a starting point when subnetting Standard values The construction of a subnet Network address The first IP address of a subnet -Set all host bits to 0 (0 decimal) First usable host address One number higher than the network address Network broadcast address The last IP address of a subnet - Set all host bits to 1 (255 decimal) Last usable host address One number lower than the broadcast address
      Read more

      IPv4 Addresses

      Networking with IPv4 IP Address, e.g., 192.168.1.165 Every device needs a unique IP address Subnet mask, e.g., 255.255.255.0 Used by the local device to determine what subnet it's on The subnet mask isn't (usually) transmitted across the network You'll ask for the subnet mask all the time What's the subnet mask of this network? Default gateway, e.g., 192.168.1.1 The router that allows you to communicate outside of your local subnet The default gateway must be an IP address on the local subnet Special IPv4 addresses Loopback address An address to yourself Ranges from 127.0.0.1 through 127.255.255.254 An easy way to self-reference (ping 127.0.0.1) Reserved addresses Set aside for future use or testing 240.0.0.1 through 254.255.255.254 Virtual IP addresses (VIP) Not associated with a physical network adapter Virtual machine, internal router address
      Read more

      Dynamic Routing Protocols

      Image
      Dynamic Routing Protocols Listen for subnet information from other routers Sent from router to router Provide subnet information to other routers Tell other routers what you know Determine the best path based on the gathered information Every routing protocol has its own way of doing this When network changes occur, update the available routes Different convergence process for every dynamic routing protocol Which routing protocol to use? What exactly is a route? Is it based on the state of the link? Is it based on how far away it is? How does the protocol determine the best path? Some formula is applied to the criteria to create a metric Rank the routes from best to worst Recover after a change to the network Convergence time can vary widely between routing protocols Standard or proprietary protocol? OSPF and RIP are standards, some functions of EIGRP are Cisco proprietary Distance-vector routing protocols Information passed between routers contains routing tables How many "hops a...
      Read more