为了支持IPv6路由的处理和计算,IS-IS新增了两个TLV(Type-Length-Value)和一个新的NLPID(Network Layer Protocol Identifier)。 新增的两个TLV分别是: 236号TLV(IPv6 Reachability):通过定义路由信息前缀、度量值等信息来说明网络的可达性。 232号TLV(IPv6 Interface Address):它相当于IPv4中的“IP Interface Addre...
As described above, IP is a network layer protocol responsible for routing. But it is not the only network layer protocol. IPsec: Internet Protocol Security (IPsec) sets up encrypted, authenticated IP connections over a virtual private network (VPN). Technically IPsec is not a protocol, but ra...
IETF中规定了IS-IS为支持IPv6所新增的内容,主要是新添加的支持IPv6协议的两个TLV(Type-Length-Values)和一个新的NLPID(Network Layer Protocol Identifier,网络层协议标识符)。 TLV是LSP(Link State PDU,链路状态协议数据单元)中的一个可变长字段值。新增的两个TLV分别是: · IPv6 Reachability:类型值为236(0x...
IS-IS(Intermediate System to Intermediate System,中间系统到中间系统)最初是国际标准化组织ISO(International Organization for Standardization)为它的无连接网络协议CLNP(ConnectionLess Network Protocol)设计的一种动态路由协议。 随着TCP/IP协议的流行,为了提供对IP路由的支持,IETF在相关标准中对IS-IS进行了扩充和修改...
IETF中规定了IS-IS为支持IPv6所新增的内容,主要是新添加的支持IPv6协议的两个TLV(Type-Length-Values)和一个新的NLPID(Network Layer Protocol Identifier,网络层协议标识符)。 TLV是LSP(Link State PDU,链路状态协议数据单元)中的一个可变长字段值。新增的两个TLV分别是: · IPv6 Reachability:类型值为236(0x...
Some DDoS attacks use Layer 3 protocols, especially ICMP, to take down targeted servers or websites. Learn more about L3 DDoS attacks and how they work.
An IP radio access network (IPRAN) is an IP-based wireless access network that uses IP/MPLS at the metro aggregation/core layer and Layer 2 enhanced Ethernet (with or without Layer 3 IP/MPLS) at the access layer. It is an integrated router/switch solution customized for IP-based base ...
switch is an appliance that forwards data packets within alocal area network (LAN). Most network switches operate at layer 2, the data link layer, not layer 3, the network layer, and therefore use MAC addresses to forward packets, not IP addresses. To learn more, seeWhat is a network ...
addresses consumes a significant amount of storage resources, and the protocol overhead is heavy. L2VPNs use only the Layer 2 links of SP networks, enabling them to support multiple Layer 3 protocols. While L3VPNs also support multiple Layer 3 protocols, they have more restrictions than L2VPNs...
Is ARP a Layer 2 protocol because it is used to learn a Layer 2 address (MAC)? or Is ARP a Layer 3 protocol because it utilizes a Layer 3 address (IP) to find information? In different texts I find conflicting information. For a certification standpoint which one should I go by.CCN...