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NEW QUESTION # 147
On the OSPF network shown in the figure, R1, R2, and R3 run OSPF, and R1 advertises four VPN routes to OSPF. A filter-policy needs to achieve the following goal: R1's and R3's routing tables contain the routes to 192.168.3.0/24, but R2's routing table does not. Which of the following filter-policies cannot meet this requirement?
- A. A filter-policy on R1 for filtering the imported routes to be advertised
- B. A filter-policy on R2 for filtering received routes
- C. A filter-policy on R1 for filtering the routes to be imported
- D. A filter-policy on R2 for filtering the routes to be advertised
Answer: C
Explanation:
* Goal Analysis:
* Requirement:
* The route to 192.168.3.0/24 must exist in R1's and R3's routing tables.
* The route must not exist in R2's routing table.
* This requires filtering to ensure the route is either:
* Blocked on R2's routing table (via filtering on R2), or
* Blocked before it is advertised to R2.
* Analysis of Each Option:
* Option A (Filter-policy on R2 for filtering received routes):
* Applying a filter-policy on R2 to filter received routes will block the route from entering R2's routing table but still allow it to propagate to R3.
* This meets the requirement.
* Option B (Filter-policy on R2 for filtering the routes to be advertised):
* Blocking the advertisement of routes from R2 to other routers does not affect the routes received by R2 itself.
* This does not meet the requirement but does not affect the propagation to R3.
* This is valid if the received route is blocked.
* Option C (Filter-policy on R1 for filtering the routes to be imported):
* If the route is filtered on R1 during the import phase, the route will not exist in R1's routing table and thus cannot be advertised to either R2 or R3.
* This fails to meet the requirement because the route must exist in R1's and R3's routing tables.
* Option D (Filter-policy on R1 for filtering the imported routes to be advertised):
* Filtering routes on R1 before advertising to R2 will prevent R2 from receiving the route but allow R1 to advertise the route to R3.
* This meets the requirement.
* Correct Option:
* C (Filter-policy on R1 for filtering the routes to be imported): This will prevent the route from existing in both R1 and R3, violating the stated requirement.
References:
HCIA-Datacom Study Guide, Chapter: OSPF Route Filtering
Huawei OSPF Configuration and Filtering Methods
NEW QUESTION # 148
Which of the following descriptions about OSPF is correct?
- A. The DD message does not necessarily carry link state summary information. At this time, the DD message can be used to negotiate the master-slave relationship
- B. Only LS Update and LS Request messages carry complete LSA information
- C. After the ospf mtu-enable command, OSPF will check the MTU length in the LSU, if it is inconsistent with the MTU length in the message sent by itself, the device will remain in the Exchange state
- D. The destination address of the Hello packet is 224.0.0.5 and 224.0.0.6
Answer: A
NEW QUESTION # 149
Which of the following statements about roaming is correct? (Multiple choice)
- A. AP that realizes wireless roaming must be in the same Extended Service Set (ESS)
- B. AP that realizes wireless roaming must have signal coverage overlapping areas
- C. An AP that realizes wireless roaming does not need to have a signal covering the overlapping area
- D. The AP that realize wireless roaming must be in the same basic service set (BSS)
Answer: A,B
NEW QUESTION # 150
iMaster NCE-Campus can be used as an authentication server on a WLAN to authenticate STAs.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
iMaster NCE-Campus Overview:
iMaster NCE-Campus is Huawei's network management platform for managing and controlling campus networks.
It supports user authentication, including STA (Station) authentication, in WLAN environments.
Authentication Modes Supported:
iMaster NCE-Campus integrates with AAA (RADIUS) servers to perform authentication for wireless clients.
NEW QUESTION # 151
Regarding the description of the default security zone of the USG series security firewall, which one is correct?
- A. The default security zone can be deleted
- B. There are 4 default security zones
- C. The default security zone cannot be deleted, but the security level can be modified.
- D. The security level of the default safe zone can be modified
Answer: B
NEW QUESTION # 152
RSTP redefines port roles. Please match the port roles of RSTP with its functions.
Answer:
Explanation:
NEW QUESTION # 153
Regarding BGP MED, which of the following descriptions are correct? (Multiple choice)
- A. By default, if there is no MED value set in the route attribute, press Process. If the best route med- none-as maximum command is configured. Then the maximum value of the MED correction is 4294967295 to process
- B. The default value of BGP route MED is 0
- C. By default, BGP route selection rules can compare the distance between routes from different autonomous systems
- D. In BGP route selection rules, the priority of MED is lower than AS-Path, Preferred-Value, Local- Preference, Origin.
Answer: A,B,D
NEW QUESTION # 154
A session is an entry used to record the connection status of a protocol and is fundamental for the firewall to forward packets. Which of the following protocol packets will the firewall create sessions for?
- A. Subsequent fragment
- B. ICMP error packet
- C. TCP
- D. GRE
Answer: C,D
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. What is a Firewall Session?
* A firewall session is an entry used to maintain the connection state of a protocol.
* When a packet is forwarded, the firewall creates a session for it and tracks subsequent packets for the same connection to ensure efficient forwarding and security enforcement.
2. Analysis of Each Option:
Option A: Subsequent fragment
* Incorrect.
* A session is created for the initial fragment of a packet. Subsequent fragments are matched to the existing session and do not trigger the creation of a new session.
Option B: ICMP error packet
* Incorrect.
* ICMP error packets (e.g., Destination Unreachable) are considered exceptions and do not create new sessions.
Option C: GRE (Generic Routing Encapsulation)
* Correct.
* GRE is a tunneling protocol that encapsulates packets. A firewall creates a session for GRE traffic to track the state of the encapsulated connection.
Option D: TCP (Transmission Control Protocol)
* Correct.
* TCP is a connection-oriented protocol, and firewalls create sessions for TCP connections to track their state (e.g., SYN, SYN-ACK, FIN).
3. Summary:
* The firewall creates sessions for GRE and TCP protocols.
NEW QUESTION # 155
R1, R2, R3, and R4 run OSPF, and the area ID is as shown in the figure, then () will generate Type-3 LSA.
Answer:
Explanation:
R2
NEW QUESTION # 156
ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall.
Which of the following statements is true?
- A. If the firewall security policy permits packets to pass, the session table is created.
- B. If the firewall security policy permits packets to pass, the packets can pass the firewall.
- C. Packets must pass the firewall, and a session table is established.
- D. By default, when status detection is disabled and the permit policy is configured packets can pass.
Answer: B
Explanation:
In a stateful inspection firewall, if the status detection mechanism is enabled, it tracks and validates the state of connections using the session table. If there is no session table and a SYN+ACK packet reaches the firewall, it checks the security policy. If the policy explicitly permits the packet, it will pass through the firewall, but no session table will be created without the initial SYN packet. The other options are either incorrect or misrepresent the behavior of stateful inspection.
NEW QUESTION # 157
Regarding the route-policy set-cost configuration below, which of the following statements is true?
- A. The route 11.1.0.0/16 is permitted by node 10, and its tost Is set to 300.
- B. The cost of all routes is set to 200.
- C. The route 11.1.0.0/16 will continue to match node 20 after permitted by node 10, and (he final cost is set to 200.
- D. All the routes that are not permitted by node 10 will be denied.
Answer: A
Explanation:
The route-policy configuration specifies that node 10 matches the IP prefix 11.1.0.0/16 and applies a cost of
300 to this route. Once a route matches a node, it is no longer processed by subsequent nodes, making option D incorrect. Option B is also incorrect because only specific matching routes have their costs changed .
NEW QUESTION # 158
Add interface GE1/0/1 to the trust security zone on the Huawei firewall. At this time, the GE1/0/1 interface belongs to the () security zone.
Answer:
Explanation:
trust
NEW QUESTION # 159
When a BGP device sends an Open message to establish a peer connection, which of the following information is carried?
- A. NLRI
- B. Hold time
- C. Local AS number
- D. Router ID
Answer: B,C,D
Explanation:
BGP Open Message Components
The Open message contains the following critical parameters:
Local AS Number: The autonomous system of the router.
Router ID: A unique identifier for the router.
Hold Time: The maximum time the router will wait for Keepalive or other messages from its peer.
NEW QUESTION # 160
By default, if no router ID is configured but multiple loopback interface addresses are configured, BGP selects the largest loopback interface address as the router ID.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
BGP Router ID Selection Rules:
If a router ID is not manually configured:
The largest loopback address is selected as the router ID. If no loopback interfaces exist, the largest active physical interface address is selected.
Default Behavior:
This ensures that a stable and unique router ID is chosen automatically, even without manual configuration.
NEW QUESTION # 161
When the service is configured as VLANPoo1, if the user fails to obtain an IP address within a certain period of time and the dhcp update vlan assignnentthreshold command is configured, VLANPoo1 will be triggered to assign a new VLAN to the user, so that the user can obtain an IP again in the new VLAN address.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 162
On the VRP platform, when we introduce OSPF routing to ISIS, if COST is not specified, the cost value will be set to 16 by default.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 163
When configuring an ACL on a router, you can specify a unique number or name to identify the ACL. Once a named ACL is created, it cannot be modified. You can only delete the named ACL and reconfigure it.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
ACL Modification
Named ACLs can be modified after their creation. Unlike numbered ACLs, named ACLs provide greater flexibility for editing individual rules without deleting the entire ACL.
NEW QUESTION # 164
The Huawei Cloud Campus solution supports the Free Mobility function. Which of the following descriptions about the Free Mobility function is correct? (Multiple choice)
- A. The controller is not only the authentication center in the campus network, but also the management center of business policies
- B. The administrator can uniformly manage the entire network policy on the controller and execute the business policy on the device
- C. In the free mobility solution, the administrator does not need to repeat the configuration for each device
- D. The administrator does not need to pay attention to the user's IP address when configuring the policy
Answer: A,B,C,D
NEW QUESTION # 165
Class 7 LSAs are generally not allowed to be transmitted in the backbone area, but you can use the suppress-forwarding-address command to allow Class 7 LSAs to be transmitted in Area 0.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 166
Among the routing policy tools commonly used in BGP, the one that can be used to match a specific AS_path is:
- A. ip-prefix
- B. ip as-path-filer
- C. filter-policy
- D. community-filter
Answer: B
NEW QUESTION # 167
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