Options, or Padding fields, but it carries the Flow Label field. This facilitates IPv6 packet processing and improves processing efficiency. The Extension Header information field is added to the IPv6 packet header to support various options without changing the existing packet format, improving flexi...
因此无法像IPv6一样将next header=59表示没有下一个协议头。在IPv4中，如果没有下一个协议头，则协议...
Just like envelopes, they have a header that contains important information for delivery. However, IPv4 and IPv6 have different header designs: IPv4 headers are like envelopes with variable sizes. They have 12 fields of information and a checksum, which helps ensure the contents haven’t been ta...
Next Header(下一包头):8位,识别紧跟IPv6头后的包头类型,如扩展头(有的话)或某个传输层协议头(诸如TCP,UDP或着ICMPv6)。 Hop Limit(跳段数限制):8位,类似于IPv4的TTL(生命期)字段。与IPv4用时间来限定包的生命期不同,IPv6用包在路由器之间的转发次数来限定包的生命期。包每经过一次转发,该字段减1,减到...
IPv4 is a 32-bit IP address IPv4 is a numeric address separated by a dot There are 12 header fields, and the length of each header field is 20 IPv4 supports Virtual Length Subnet Mask (VLSM) IPv4 maps to the MAC address of a network card using the Post Address Resolution Protocol ...
IPv4中的Header Checksum被去掉了,是因为IPv4经过每个路由器都要改变TTL,意味着每个路由器都要重新计算这个值,这会大大的降低效率,由于数据链路技术的提高和32位循环冗余校验支持,以及第4层校验和提供了足够的保护,因而IPv6认为头部校验和不再必需。 三、IPv6扩展报头 ...
配置接口的IP地址 前提条件 在配置接口的IP地址之前,需要配置接口的链路层协议参数,使接口的链路层协议状态为Up。 背景信息 为了使接口运行IP业务,需要为接口配置IP地址。 设备的每个接口可以配置多个IP地址,对于IP地址主从模式,其中一个为主IP地址,其余为从IP地址。
originalIndicates that the value of the Traffic Class field in the IPv6 field of the IPv6 tunnel header uses the value in Traffic Class field of the original packet.- class-valueSpecifies the traffic level of the IPv4 over IPv6 tunnel.The value is an integer that ranges from 0 ...
IPv6 as we know offers variety of enhancements including increased addressing capacity,Quality of service(QoS) provisioning, built in security through IPSec, and also improved routing and mobility efficiency over IPv4. BD-SIIT is a bidirectional stateless internet protocol/Internet control messaging proto...
IPv6报头中的哪个字段的作用类似于IPv4报头中的TTL字段?()A.VersionB.TrafficClassC.HopLimitD.NextHeader