Regarding the description of the encapsulation format of the labels in MPLS, the correct one is ?

• A.The TTL field in the label has a similar meaning to the TTL (Time To Live) in the IP packet, and also has the effect of preventing loops
• B.label in the S field, lbit Used to identify whether the label is a bottom label, and a value of 1 indicates that it is the penultimate label
• C.The total length of an MPLS single tag is 4 bytes (32 bits).
• D.For Ethernet, PPP packets, the tag stack is like a "cushion layer", located between the layer 2 header and the data, and when there is a VLAN tag, the MPLS header is placed on the Ether head and VLANtag between

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BGP EVPN does MAC address advertisement, ARP message advertisement, and IRB route advertisement for which BGP EVPN route is advertised?

• A.Type2
• B.Type1
• C.Type4
• D.Type3

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What is the relationship between CIR, BC and TC? (single select)

• A.CIR=TC/BC
• B.TC=CIR/BC
• C.CIR=BE/TC
• D.TC=BC/CIR

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In order for routers at both ends of the IPv6 over lPv4 manual tunnel to exchange routing information, OSPV3 can be enabled on the tunnel, osPFv3 will be able to form a normal neighbor relationship, and the tunnel interface will be treated as a P2P link interface.

• A.FALSE
• B.TRUE

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Which of the following statements is incorrect about intranet security design for a large or medium-sized virtualized campus network?

• A.In addition to terminal access security, interface security must be considered during wireless network security design.
• B.Traffic suppression can be configured on the wired network to block broadcast traffic by shutting down interfaces.
• C.To secure data transmission, the CAPWAP tunnel between the AC and AP supports DTLS encryption.
• D.Intranet security refers to both wired and wireless network security.

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