IP报文中IP header至少为（）字节。
IP报文中IP header至少为（）字节。
相关考题：
Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by ESP?() (Choose three.) A. data integrityB. data confidentialityC. data authenticationD. outer IP header confidentialityE. outer IP header authentication
关于IGMPV2消息报文的目的IP地址和协议报文中的组地址（GroupAddress）字段填充正确的是（）。A、通用组査询报文的目的IP地址为224.0.0.1，报文中的组地址字段为0.0.0.0B、特定组査询报文的目的IP地址与报文中的组地址相同C、成员Report报文的目的IP地址与报文中的组地址相同D、成员Leave报文的目的IP地址与报文中的组地址相同
以下关于VRRP报文中IP地址的设置正确的说法是（）。A、源IP地址为Master端口的IP地址B、源IP地址为虚拟路由器的虚拟IP地址C、目的IP地址为广播IP地址D、目的IP地址为组播IP地址
Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by ESP?（） (Choose three.)A、data integrityB、data confidentialityC、data authenticationD、outer IP header confidentialityE、outer IP header authentication
Which statement correctly describes the disabling of IP TTL propagation in an MPLS network？（）A、The TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSRB、TTL propagation cannot be disabled in an MPLS domainC、TTL propagation is only disabled on the ingress edge LSRD、The TTL field of the MPLS label header is set to 255E、The TTL field of the IP packet is set to 0
Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by ESP？（）A、data integrityB、data confidentialityC、data authenticationD、outer IP header confidentialityE、outer IP header authentication
When an SRX series device receives an ESP packet, what happens?（）A、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it willB、If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it willC、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based packet.D、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based of inner header, it will decrypt the packet.
多选题Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by AH?（） (Choose three.)Adata integrityBdata confidentialityCdata authenticationDouter IP header confidentialityEouter IP header authentication
多选题Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by ESP？（）Adata integrityBdata confidentialityCdata authenticationDouter IP header confidentialityEouter IP header authentication
多选题以下关于VRRP报文中IP地址的设置正确的说法是（）。A源IP地址为Master端口的IP地址B源IP地址为虚拟路由器的虚拟IP地址C目的IP地址为广播IP地址D目的IP地址为组播IP地址
单选题When an SRX series device receives an ESP packet, what happens?（）AIf the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it willBIf the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it willCIf the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based packet.DIf the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based of inner header, it will decrypt the packet.
单选题Which QoS preclassification option will require the use of the qos pre-classify command for the VPN traffic？ （）AVPN traffic needs to be classified based on the Layer2 header informationBVPN traffic needs to be classified based on the IP precedence or DSCPCVPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP addressDVPN traffic with Authentication Header （AH） needs to preserve the ToS byte
单选题Which statement is true about IP telephony calls？（）A A Voice over IP （VoIP） packet consists of the voice payload， IP header， TCP header， RTP header， and Layer 2 link header.B The voice carrier stream uses H323 to set up， maintain， and tear down call endpoints.C Call control signaling uses Real-Time Transport Protocol （RTP） packets that contain actual voice samples.D The sum of bandwidth necessary for each major application， including voice， video， and data， should not exceed 75 percent of the total available bandwidth for each link.