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NEW QUESTION # 138
Given the following Python code, the output of print(Test) is the same as that of print(test). Test = ' Hello World ' ; test = ' hello world '
Answer: B
Explanation:
Python identifiers and string values are case-sensitive. The variables Test and test are therefore two different variable names, and the assigned strings also differ in capitalization. Test contains the string ' Hello World ' , whereas test contains ' hello world ' . Calling print(Test) outputs the capitalized form, while print(test) outputs the lowercase form. Python does not automatically normalize case when resolving variable names or when displaying strings. The same principle applies to function names, class names, dictionary keys, and most other identifiers or values used in network automation scripts. In Datacom automation work, case sensitivity matters when processing device output, JSON/YANG data, NETCONF payloads, interface names, and user-defined variables. A script that refers to Test when only test has been defined can even raise a NameError because Python treats the two identifiers as unrelated. In this question both variables are defined, but their printed output is visibly different. Consequently, the statement that the two print operations produce the same output is FALSE, option B.
NEW QUESTION # 139
DAD enables a node to detect whether an IPv6 address is already in use by another node before assigning it to an interface. This ensures that duplicate unicast addresses do not exist on a network. Which of the following packets are used for DAD? (Select all that apply)
Answer: A,C
Explanation:
Duplicate Address Detection ( DAD ) is an IPv6 mechanism used to verify that a unicast address is not already in use before the address is assigned to an interface. DAD is implemented using Neighbor Solicitation (NS) and Neighbor Advertisement (NA) messages, which are part of the ICMPv6 Neighbor Discovery protocol. Therefore, options A and D are correct.
When a host wants to verify a tentative IPv6 address, it sends an NS message for that address. If another node on the link is already using that address, that node responds with an NA message, indicating the address is duplicated and cannot be assigned. If no NA is received within the required period, the host assumes the address is unique and can use it. Options B and C are incorrect because Router Solicitation (RS) and Router Advertisement (RA) are used for router discovery, prefix advertisement, and stateless address autoconfiguration, not for DAD itself. HCIA-Datacom emphasizes the distinction between Neighbor Discovery functions, including address resolution, next-hop reachability, router discovery, and duplicate address detection in IPv6 networks.
NEW QUESTION # 140
On the network shown in the figure, the three PCs belong to VLAN 2. When configuring interface-based VLAN assignment, the administrator only forgets to configure the PVID of GE1/0/1. However, PC1 can still communicate with PC2 at Layer 2.
Answer: B
Explanation:
Interface-based VLAN assignment determines the VLAN associated with an Ethernet frame according to the configuration of the receiving interface.
When an access interface receives an untagged frame, the switch assigns the frame to the VLAN specified by its Port VLAN ID (PVID).
In this scenario, the administrator forgets to configure the PVID of GE1/0/1 on SW1. Consequently, the interface retains its default PVID of VLAN 1.
PC1 sends untagged Ethernet frames through GE1/0/1, so those frames enter VLAN 1. Meanwhile, PC2 belongs to VLAN 2.
Because VLAN 1 and VLAN 2 represent separate Layer 2 broadcast domains, the switch does not directly forward traffic between them.
Without additional inter-VLAN routing or changes to VLAN membership, PC1 cannot communicate with PC2.
Therefore, the statement is FALSE.
NEW QUESTION # 141
When configuring wireless services on a Huawei WAC, you need to configure a service VLAN to ensure the proper transmission of data packets from STAs. In which of the following profiles is the service VLAN configured?
Answer: A
Explanation:
On a Huawei WAC, the VAP profile is the profile that brings together the service attributes required to instantiate a wireless service on an AP radio. The service VLAN is configured in this VAP profile using the service-vlan command. The VAP profile can also reference an SSID profile and a security profile and can define the data forwarding mode, allowing the wireless service to map associated STA traffic into the correct wired VLAN. The SSID profile primarily defines the WLAN name and related SSID behavior. The security profile defines authentication and encryption policies such as WPA/WPA2/WPA3 parameters. The regulatory domain profile controls radio regulatory settings such as country-specific channel and transmit-power constraints. None of those profiles is the location in which the service VLAN itself is defined. Huawei configuration examples explicitly show the administrator entering the VAP profile view and then applying service-vlan vlan-id or a VLAN pool. Therefore, the correct choice is C, VAP profile.
NEW QUESTION # 142
On the network shown in the figure, GE1/0/1 and GE1/0/2 of SW1 are access interfaces, and their PVIDs are VLAN 2 and VLAN 3 respectively. GE1/0/1 of SW2 is also an access interface, and its PVID is VLAN 4.
Which of the following configurations on SW1 and SW2 can ensure that data packets sent from PC1 and PC2 can reach PC3?
Answer: A,C
Explanation:
PC1 and PC2 are in different VLANs on SW1, while PC3 is in VLAN 4 on SW2. To allow traffic from VLAN 2 and VLAN 3 users to reach PC3 through the inter-switch link, SW1 must be able to send frames from PC1 and PC2 toward SW2 in a form that SW2 can place into VLAN 4.
Option B is valid because a hybrid interface on SW1 can send frames from VLAN 2 and VLAN 3 untagged, and setting the PVID to VLAN 4 allows untagged inbound frames on the peer side to be associated appropriately when matched with the SW2 configuration. Option C is also valid because configuring SW2's GE1/0/3 as a trunk allowing VLAN 4 and setting its PVID to VLAN 4 means untagged frames arriving from SW1 are treated as belonging to VLAN 4 and can then be forwarded to PC3 through its access interface.
Option A is incomplete because only configuring SW2 does not solve the VLAN handling on SW1. Option D is incorrect because a trunk on SW1 would send VLAN 2 and VLAN 3 frames tagged, which would not match the VLAN 4-only expectation on SW2 in this scenario.
NEW QUESTION # 143
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