QUESTION: 41

Which of the following statements regarding MPLS label encapsulation format are true? (Multiple Choice)

The total length of an MPLS label is 4 bytes (32 bits).
The TTL field in an MPLS label has the same meaning as that in an IP packet, and can prevent loops.
The S field in an MPLS label has 1 bit and is used to identify whether the label is the bottom-ofstack label. If the value is 1, the label is a penultimate-layer label.
For Ethernet and PPP packets, a label stack is located between the Layer 2 packet header and data.
If a VLAN tag is available, the label stack is placed before the VLAN tag.

Answer(s): A,B

QUESTION: 42

The DHCP protocol can allocate TCP/IP-re la ted parameters to clients. DHCP defines multiple types of packets for this process. Which is the encapsulation mode for these packets?

TCP encapsulation
IP encapsulation
UDP encapsulation
PPP encapsulation

Answer(s): C

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QUESTION: 43

If the DSCP priority (leftmost 6 bits of the ToS field) is used, how many types of packets can be classified?

8
16
32
64

Answer(s): D

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The stateful inspection firewall uses the session table to trace activated TCP and UDP sessions, firewall security policies determine which sessions are established, and only the packets associated with sessions are forwarded.

TRUE
FALSE

Answer(s): A

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QUESTION: 44

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