组播（Multicast）传输： 在发送者和每一接收者之间实现点对多点网络连接。 如果一台发送者同时给多个的接收者传输相同的数据，也只需复制一份的相同数据包。它提高了数据传送效率。...组播(multicast): 也叫多播， 多点广播或群播。 指把信息同时传递给一组目的地址。它使用策略是最高效的，因为消息在每条网络链路上只需传递一次，而且只有在链路分叉的时候，消息才会被复制。...判断网卡是否支持组播 在Linux运行ifconfig, 如果网卡信息中包含UP BROADCAST RUNNING MULTICAST，则支持广播和组播。...参考： http://colobu.com/2014/10/21/udp-and-unicast-multicast-broadcast-anycast 组播IP地址 组播IP地址用于标识一个IP组播组...参考：http://www.china-ccie.com/ccie/lilun/Multicast/Multicast.html 组播数据包的生存时间 将消息发送到多播组时，该主机和端口的所有预定接收者都将接收到消息
Multicast 组播 组播是指从某一地址把信息同时传递给一组目的地址。...随后再用ACK(acknowledgments)或NAK(negative acknowledgments)来修复失败的组播 SRM(Scalable Reliable Multicast) 使用NAK...为了避免NAK风暴 随机延迟一段时间发送请求 使用exponential backoff：每次请求的间隔为上一次时长的两倍 RMTP(Relicable Multicast Transport Protocol
委托可以包含多个方法，这种委托称为多播委托。如果调用多播委托，就可以按顺序连续调用多个方法。为此，委托的签名必须返回void，否则就只能得到委托调用的最后一个方...
在RTSP协议的拉流传输中，我们知道最常见的传输协议肯定是UDP和TCP了，TSINGSEE青犀视频云边端架构视频平台比如国标GB28181平台EasyGBS及...
step.03：设置IP_MULTICAST_LOOP等组播选项。 step.04：使用IP_MULTICAST_IF选项来定义组播接口。...IP_MULTICAST_IF：设置组播中发送数据报文的接口。 IP_MULTICAST_TTL：设置组播中数据报文的生存时间(TTL)。...The message send to multicast server is: "Multicast Data MSG!" 接收端： get datagram message ok!...The message from multicast server is: "Multicast Data MSG!"...to group: 224.1.1.1 Multicast to group: 224.1.1.1 Multicast to group: 224.1.1.1 Multicast to group
enabled="true"> 224.2.2.3 54327 内的元素也是一个名为MulticastConfig的实体，而中的 224.2.2.3 54327 224.2.2.3 <multicast-port
使用之前确保网络环境支持 Multicast。 ..."> 224.2.2.3 54327... 32...其中 元素用来配置 组播协议 组网的相关参数。当设置 元素中 enabled 属性为 true 时，表示启用 组播协议 组网。...enabled="false"> FF02:0:0:0:0:0:0:1 <multicast-port
noop state DOWN mode DEFAULT group default qlen 1000 link/tunnel6 :: brd :: 6: wangpo: <BROADCAST,MULTICAST...noop state DOWN mode DEFAULT group default qlen 1000 link/tunnel6 :: brd :: 6: wangpo: <BROADCAST,MULTICAST...default qlen 1000 link/ether 22:01:ca:58:3d:59 brd ff:ff:ff:ff:ff:ff 7: xmq2wp@wp2xmq: <BROADCAST,MULTICAST...default qlen 1000 link/ether be:27:e3:04:85:13 brd ff:ff:ff:ff:ff:ff 8: wp2xmq@xmq2wp: <BROADCAST,MULTICAST...default qlen 1000 link/ether d2:98:28:54:86:aa brd ff:ff:ff:ff:ff:ff 8: wp2xmq@if7: <BROADCAST,MULTICAST
比如，在的机器上执行该命令，结果如下： sh-3.2# ifconfig lo0: flags=8049 mtu 16384 options...fe80::1%lo0 prefixlen 64 scopeid 0x1 nd6 options=201 gif0: flags=8010 mtu 1280 stf0: flags=0 mtu 1280 en0: flags=8863 mtu...,DAD> media: autoselect status: active en1: flags=8963 status: inactive bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST
ChannelOption IP_TOS = valueOf("IP_TOS"); public static final ChannelOption IP_MULTICAST_ADDR...= valueOf("IP_MULTICAST_ADDR"); public static final ChannelOption IP_MULTICAST_IF...= valueOf("IP_MULTICAST_IF"); public static final ChannelOption IP_MULTICAST_TTL = valueOf...("IP_MULTICAST_TTL"); public static final ChannelOption IP_MULTICAST_LOOP_DISABLED = valueOf...("IP_MULTICAST_LOOP_DISABLED"); public static final ChannelOption TCP_NODELAY = valueOf
msdn.microsoft.com/en-us/library/system.net.sockets(VS.96).aspx UdpAnySourceMulticastClient ： A client receiver for multicast...traffic from any source, also known as Any Source Multicast (ASM) or Internet Standard Multicast (ISM...UdpSingleSourceMulticastClient: A client receiver for multicast traffic from a single source, also known...as Source Specific Multicast (SSM)....www.silverlightplayground.org/post/2010/01/02/Writing-a-server-less-conferencing-client-with-Silverlight-40-UDP-Multicast.aspx
= true; if(is_enable_multicast) { int is_multicast...boolean is_enable_ssm_multicast = true; String multicast_address = "";...if(is_enable_ssm_multicast) { multicast_address = MakeSSMMulticastAddress...= MakeMulticastAddress(); } Log.i(TAG, "is_enable_ssm_multicast...:" + is_enable_ssm_multicast + " multiAddr: " + multicast_address); libPublisher.SetRtspServerMulticastAddress
msdp-tracert MSDP trace route to source RP mtracert Trace route to multicast...source multicast Specify multicast configuration information multicast-source-deny...Multicast source port deny ndp Neighbor discovery protocol nslookup...patch Patch module pim Specify PIM(Protocol Independent Multicast...udp-helper UDP HELPER module undo Cancel current setting unknown-multicast
255.255.255.0 inet6 addr: fe80::50:ff:fe00:1/64 Scope:Link UP BROADCAST RUNNING MULTICAST...:36:7D inet6 addr: fe80::6800:c4ff:fe12:367d/64 Scope:Link UP BROADCAST RUNNING MULTICAST...:83:59 inet6 addr: fe80::545a:20ff:fe32:8359/64 Scope:Link UP BROADCAST RUNNING MULTICAST...:76:F4 inet6 addr: fe80::144d:19ff:fee5:76f4/64 Scope:Link UP BROADCAST RUNNING MULTICAST...:28:59 inet6 addr: fe80::a817:c7ff:fe06:2859/64 Scope:Link UP BROADCAST RUNNING MULTICAST
255.255.255.0 inet6 addr: fe80::282e:beff:fecf:8cdc/64 Scope:Link UP BROADCAST RUNNING MULTICAST...255.255.255.0 inet6 addr: fe80::282e:beff:fecf:8cdc/64 Scope:Link UP BROADCAST RUNNING MULTICAST...inet addr:10.10.10.159 Bcast:192.168.99.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST...inet addr:10.10.10.159 Bcast:10.10.10.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST...inet addr:10.10.10.159 Bcast:10.10.10.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST
配置参数如下： discovery.zen.ping.multicast.group:224.5.6.7 # 端口 discovery.zen.ping.multicast.port:1234 #...广播消息ttl discovery.zen.ping.multicast.ttl:3 # 绑定的地址，null表示绑定所有可用的网络接口 discovery.zen.ping.multicast.address...# discovery.zen.ping.multicast.enabled: false # #设置是否打开多播发现节点，默认是true。...ES服务发现实现 本次讨论仅为multicast广播版本的实现，不含其他。 它是以plugin形式接入的，以 discovery.zen.ping.multicast.enabled 作为开关。...("discovery.zen.ping.multicast.buffer_size", 2048); this.ttl = this.settings.getAsInt("discovery.zen.ping.multicast.ttl
而使用组播（multicast）向多个端点同时发送消息可以得到更好的效率，因为网络基础设施可以确保数据包会被传送到所有接收方。 组播消息总是使用UDP发送，因为TCP需要提供一对通信系统。...要使用IP_MULTICAST_TTL选项与setsockopt()函数来设置TTL。默认值1表示路由器不会把数据包转发到当前网段之外。TTL最大取值255，应包包装为1个字节。...= struct.pack('b', 1)#本博主数据结构与算法第10篇对struct二进制结构体进行介绍 sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL..., ttl) try: msg = "群发的消息，你不必回".encode('UTF-8') sent = sock.sendto(msg, multicast_group)...示例代码如下： import socket import struct multicast_group = '224.3.29.71' server_address = ('', 10000) sock
qlen 1000 link/ether 00:0c:29:57:26:9d brd ff:ff:ff:ff:ff:ff 3: eno33554960: <BROADCAST,MULTICAST...ff:ff:ff:ff:ff:ff 查看当前主机指定网络连接信息 # ip link show eno16777728 2: eno16777728: <BROADCAST,MULTICAST...off # ip link show eno16777728 //如下，没有出项MULTICAST 2: eno16777728: mtu...qlen 1000 link/ether 00:0c:29:57:26:9d brd ff:ff:ff:ff:ff:ff # ip link set eno16777728 multicast...:1/128 scope host valid_lft forever preferred_lft forever 2: eno16777728: <BROADCAST,MULTICAST
本文主要包含2个部分，前半部分主要分析RACSignal的subscription过程，后半部分是对前半部分的深入，在subscription过程的基础上分析ReactiveCocoa中比较难理解的两个操作：multicast...从上面的例子中，我们可以看到对一个Signal进行multicast之后，我们是对connection.signal进行subscription而不是原来的networkRequest。...这点是"side effects should only occur once"的关键，我们将在后面解释 multicast原理分析 replay是multicast的一个特殊case而已，而multicast...multicast的机制Part 2: 在进行multicast的步骤二之前，需要介绍一下RACSubject以及RACReplaySubject ---------------------恼人的分隔线...具体过程留作思考 在RACSignal+Operation中关于multicast && replay的，一共有5个操作：publish、multicast、replay、replayLast、replayLazily
mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 ixgbe0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST... groupname ipmp ether 0:1b:21:6f:8d:dc ixgbe0:1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST...工作是否正常 bash-3.2# if_mpadm -d ixgbe0 bash-3.2# ifconfig -a lo0: flags=2001000849 mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 ixgbe0: flags=89000842<BROADCAST,RUNNING,MULTICAST...0 groupname ipmp ether 0:1b:21:6f:8d:dc ixgbe0:1: flags=89040842<BROADCAST,RUNNING,MULTICAST
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