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At a regional hospital, the branch support lead must derive an interface identifier from MAC 00:25:96:12:34:56 using modified EUI-64. During review, someone proposes: "Copy the MAC unchanged as a 48-bit interface ID." Which technical explanation most directly shows why this proposal does not solve the requirement?
A direct MAC copy is not the specified modified EUI-64 construction. The effective remedy is to insert ff:fe into the MAC middle and invert the U/L bit of the first octet.
The resulting IID is only part of a full IPv6 address. It concerns a different proposed change, not the change being evaluated.
Modified EUI-64 also toggles the universal/local bit. The statement addresses a different mechanism. Here the engineer specifically proposed copy the mac unchanged as a 48-bit interface id; the decisive limitation is that a direct MAC copy is not the specified modified EUI-64 construction.
Modified EUI-64 transforms the 48-bit MAC into a 64-bit interface ID and flips its U/L bit. A true general network fact is not necessarily the direct diagnosis. The named change was copy the mac unchanged as a 48-bit interface id, whose relevant defect is that a direct MAC copy is not the specified modified EUI-64 construction.
At a university, a network administrator has a Windows PC with an unexpected APIPA address and needs to inspect IP, gateway, and DNS settings. Which choice best addresses the stated requirement?
Windows ipconfig /all shows interface addressing and DHCP-related client parameters.
Cisco IOS syntax is not the default Windows command interface.
Ping tests reachability but not all lease parameters.
A browser cache cannot display the DHCP-assigned default gateway.
At a research campus, a network operations engineer needs the active IPv4 address and interface of a Linux workstation after a move between wired and wireless networks. Which choice best addresses the stated requirement?
Linux iproute2 tools display interface addresses and routes locally.
Spanning-tree election has no connection to client IP inspection.
Static name entries cannot establish the active interface address, its CIDR prefix or installed gateway route; inspect the host IP state.
A routing-table listing alone does not enumerate interface address/prefix assignments and operational link configuration; pair it with `ip address show`.
At a supply depot, the migration lead has macOS hosts with correct DNS but incorrect local IP prefix after a configuration profile update. Which choice best addresses the stated requirement?
Client TCP/IP settings show the prefix and gateway needed to diagnose on-link reachability.
DNS can work through alternate paths and does not prove subnet correctness.
Removing the gateway may worsen routed connectivity; the error is the local prefix configuration and must be corrected on the host.
Changing relay configuration does not overwrite an incorrect local manual/profile mask on a host; inspect the network profile first.
At a public library, a network administrator has a workstation that can ping local peers but cannot reach other networks; it has no default route. Which choice best addresses the stated requirement?
Without a matching route or default gateway, off-subnet destinations have no path.
Name resolution is not the missing step for an absent default route; verify the host gateway and routing table.
Updating resolver settings without a gateway cannot restore off-subnet IPv4 forwarding to numeric destinations.
MAC aging does not give the host a Layer 3 gateway.
At a hotel, a network operations engineer has a Windows PC with an unexpected APIPA address and needs to inspect IP, gateway, and DNS settings. During review, someone proposes: "Rely on ping alone as a full IP configuration listing." Which technical explanation most directly shows why this proposal does not solve the requirement?
Ping tests reachability but not all lease parameters. The effective remedy is to run ipconfig /all and compare the DHCP lease, gateway and DNS fields.
A browser cache cannot display the DHCP-assigned default gateway. It concerns a different proposed change, not the change being evaluated.
Cisco IOS syntax is not the default Windows command interface. This observation would apply to another device or feature, not the proposed rely on ping alone as a full ip configuration listing. For this scenario, ping tests reachability but not all lease parameters is the direct cause.
Windows ipconfig /all shows interface addressing and DHCP-related client parameters. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed rely on ping alone as a full ip configuration listing. The actual issue is that ping tests reachability but not all lease parameters.
At a university, the infrastructure lead needs the active IPv4 address and interface of a Linux workstation after a move between wired and wireless networks. During review, someone proposes: "Use switchport mode access on the Linux shell." Which technical explanation most directly shows why this proposal does not solve the requirement?
That command is Cisco IOS switch configuration syntax. The effective remedy is to run ip address show and ip route on the Linux host.
A DNS lookup does not reveal the host prefix length. This observation would apply to another device or feature, not the proposed use switchport mode access on the linux shell. For this scenario, that command is Cisco IOS switch configuration syntax is the direct cause.
Linux iproute2 tools display interface addresses and routes locally. A true general network fact is not necessarily the direct diagnosis. The named change was use switchport mode access on the linux shell, whose relevant defect is that that command is Cisco IOS switch configuration syntax.
Spanning-tree election has no connection to client IP inspection. It concerns a different proposed change, not the change being evaluated.
At a hotel, the campus network lead must place three 2.4-GHz 20-MHz APs in adjacent cells with minimal channel overlap in a typical regulatory environment supporting these channels. Which choice best addresses the stated requirement?
In common 2.4-GHz deployments, channels 1/6/11 minimize co-channel overlap for 20-MHz plans.
These overlap strongly in 2.4 GHz.
An SSID names a WLAN rather than setting center frequency.
Security settings do not eliminate overlapping spectral emissions.
At a clinic, a network administrator needs users to discover a managed wireless network by a consistent name across several APs. Which choice best addresses the stated requirement?
An SSID identifies the wireless network offered to associating clients.
Distinct SSIDs would force clients to select or roam between named networks and do not supply the common managed WLAN identity.
DNS cache lifetime does not advertise a WLAN.
NTP does not manage wireless SSID advertisements.
At an engineering company, the security and networking lead has interference and poor signal-to-noise ratio in the plant near metallic machinery. Which choice best addresses the stated requirement?
Wireless attenuation and interference require radio-level measurement and channel planning.
Changing IP addressing does not improve received RF energy.
Leases do not alter radio propagation or co-channel activity.
Unmeasured increases in transmit power can enlarge overlapping cells and worsen contention; a site survey must inform channel and power planning.
At a logistics provider, an implementation partner must prevent casual disclosure of client traffic over a shared wireless medium. Which choice best addresses the stated requirement?
Wi-Fi encryption protects radio frames against passive observation within its threat model.
SSID hiding is not link-layer data confidentiality; radio traffic still needs encryption and proper authentication.
Client MAC filtering is not cryptographic confidentiality and MAC identities can be spoofed over the wireless medium.
SSID suppression does not encrypt exchanged client frames.
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