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NEW QUESTION 281
Regarding the description of the encapsulation format of the labels in MPLS, the correct one is ?
- A. 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
- B. 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
- 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
Answer: B,C
NEW QUESTION 282
In a data communication session between two hosts, which level does the session layer of the oSI model of the host on one end communicate with the osl mode of the host on the other end?
- A. Communicate with the data link layer at the other end
- B. Communicate with the presentation layer at the other end
- C. Communicate with the conversation layer on the other end B Communicate with the application layer at the other end
- D. Communicate with the physical layer at the other end
Answer: C
NEW QUESTION 283
When configuring the source NAT and having no pat configuration parameters, which of the following statements is true?( Radio)
- A. Simultaneous source P address and source port translation
- B. Perform destination IP address and destination port translation
- C. Only destination IP address translation occurs
- D. Only source P address translation occurs
Answer: D
NEW QUESTION 284
As shown below, what routes will R2 learn?( Single choice questions).
- A. R2 can learn the 101.20/24 and 101.30/24 routes.
- B. R2 can learn the 101.1.0/24 route.
- C. R2 can learn all routes to R1.
- D. R2 can receive an LSP for R1, but cannot join to the routing table.
Answer: C
NEW QUESTION 285
IPv6 introduces the Solicited-Node address, which is described correctly below (multiple choice)
- A. IPv6 introduced the Solicited-Node address to support IPv6 multicast.
- B. If the Solicited-Node address is not configured , the router automatically generates one on each interface.
- C. The Solicited-Node address on the router interface is automatically generated and can have multiple.
- D. This is a specific address that is used for resolution in ARPv6 The MAC address.
Answer: C
NEW QUESTION 286
What are the following advanced features supported by BGP EVPN?
- A. Multi-active gateway
- B. VRRP overVXLAN
- C. ARP broadcast suppression
- D. WI-AN Qos
Answer: A,B,C,D
NEW QUESTION 287
In an IPv6 network, two nodes A and B are neighbors to each other if node A sends to node B NS message, if Node B receives the message and then replies to the NA message, then on Node A On the view, the neighbor status will be marked as What?
- A. Probe Answer
- B. Incomplete
- C. Constant
- D. Reachable
Answer: D
NEW QUESTION 288
If an administrator wants to manage certain routes on the router during operations, the following tools are listed below. These routes can be flagged so that administrators can configure policies
- A. If the BGP protocol is running, the route is marked with the community attribute
- B. Use ipprefix to tag routes on the router.
- C. Use ACLs to tag routes on the router.
- D. Use the Tag value to mark the route on the router.
Answer: A,D
NEW QUESTION 289
What is the field that the IPv6 header has similar to the IPv4 header "Type of Service" field?
- A. Flow Label
- B. Traffic Class
- C. Next Header
- D. Version
Answer: B
NEW QUESTION 290
The RSTP protocol provides a variety of protection functions, such as when the edge port is configured as a protection state, the edge port receives the BPDU packet processing method;
- A. Directly discard the BPDU packet
- B. Close the port
- C. Forward BPDU packets as required
- D. After parsing the BPDU message, the relevant information is obtained
Answer: B
NEW QUESTION 291
Which of the following are used in Ethernet?
- A. 8025 encapsulated frames
- B. Mac address in canonical format
- C. A MAC address in a non-canonical format
- D. 8023 Encapsulated Frame
- E. CSMA/CD in multiplexed interviews
Answer: B,D,E
NEW QUESTION 292
What is the following description of MPLS incorrect?
- A. The length of the MPLS tag is 20 to 20 for packet forwarding.
- B. MPLS supports multi-layer label nesting, and the S bit value of the innermost label is 1.
- C. When using the TTL processing method of Pipe mode, the IP packet transmits the TTL of the IP packet over the IPLS network. The value is only minus 1 for the MPLS in and out nodes.
- D. The tag space range of dynamic signaling protocols such as LDP, M P-BGP is 16 to 1023
Answer: D
NEW QUESTION 293
ICMPv6 has two types: Error Messages and Information Messages.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 294
In a multicast network running PIM-SM mode, how does the router choose the upstream interface?
- A. Interfaces to which multicast group members are directly connected
- B. The interface that is fast to the PIlM Join message
- C. looks up the outgoing interface corresponding to the RP address in the unicast routing table
- D. Find the outbound interface corresponding to the mapping proxy in the unicast routing table
- E. Interface for sending PIM Heilo messages.
Answer: C
NEW QUESTION 295
Which of the following attacks are DoS (Denial of servioe) attacks?( Multiple choice question)
- A. Man-in-the-middle attack
- B. Source P address spoofing attack
- C. Single packet attack
- D. Flood Attack
Answer: C,D
NEW QUESTION 296
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