You are troubleshooting an 802.1X deployment on an EX4300 switch. Clients fail to authenticate when using Supplicant-based authentication combined with MAC RADIUS fallback. You notice that the switch does not attempt MAC RADIUS after 802.1X times out. Which configuration error most likely caused this?
You are implementing MAC RADIUS authentication on an EX4600 switch. You notice that when a device connects, the switch sends the MAC address in the Username attribute (RADIUS attribute 1) with hyphen separators (e.g., aa-bb-cc-dd-ee-ff). Your RADIUS server expects colons (aa:bb:cc:dd:ee:ff). Where must you configure this format change on Junos OS?
An EX Series switch is configured with multiple-supplicant mode on an access port connected to an IP phone with a PC daisy-chained behind it. The IP phone authenticates via 802.1X, but the PC uses MAC RADIUS. The phone authenticates successfully and moves to the voice VLAN. However, when the PC boots, it fails authentication because the switch rejects a second supplicant on the same logical port index. Which configuration parameter resolves this issue?
You are configuring captive portal on an EX Series switch using J-Web and CLI. Users are redirected to the captive portal page, but after successful authentication, they still cannot access the external network. Inspecting the routing table and firewall filters, what is the most likely reason for this post-authentication restriction?
An administrator configures 802.1X authentication with local server fallback on an EX Series switch. When the external RADIUS server is unreachable, the switch fails over to the local user database. However, users authenticated via the local database are placed in the default access VLAN instead of the VLAN specified in their local user profile. What is the cause of this behavior?
You are configuring captive portal on an EX Series switch. You want users to be redirected to an external web server hosted at https://portal.enterprise.com/login. Where do you specify this redirection URL in the Junos OS CLI?
You are configuring MAC RADIUS authentication on an EX Series switch and want to ensure that devices failing MAC RADIUS are assigned to a restricted quarantine VLAN. Where is the quarantine VLAN configured for failed MAC RADIUS attempts?
An enterprise deploys 802.1X with dynamic VLAN assignment. When a user authenticates, the RADIUS server returns the correct VLAN name, but the switch places the port into a different VLAN. Upon checking the switch, you find that the VLAN name returned by RADIUS does not match any VLAN configured in the local 'vlans' configuration hierarchy. How does Junos OS handle this discrepancy?
You are configuring an EX Series switch to support MAC RADIUS authentication. You want to ensure that the switch sends accounting start and stop packets to the RADIUS server. Which configuration hierarchy is required to enable RADIUS accounting for access clients?
You are configuring an EX Series switch for 802.1X authentication. You want to ensure that if a supplicant fails authentication, the port is moved into a specific guest VLAN. Where is the guest VLAN referenced within the dot1x interface configuration?
An administrator implements MAC RADIUS authentication on an EX Series switch. Several legacy printers connected to the ports fail to authenticate because they send their MAC addresses in uppercase letters with no separators (AABBCCDDEEFF), while the RADIUS server expects lowercase with colons (aa:bb:cc:dd:ee:ff). How can you resolve this mismatch on the Junos switch?
You are configuring an EX Series switch to use MAC RADIUS authentication. You notice that when devices connect, the switch sends authentication requests, but the accounting start packets are not being sent. What configuration is missing?
Which THREE attributes or conditions must be met for successful dynamic VLAN assignment via RADIUS during 802.1X authentication on Junos EX Series switches? (Choose three)
Which THREE diagnostic tools or show commands are useful when troubleshooting MAC RADIUS authentication failures on an EX Series switch? (Choose three)
Which THREE features or parameters can be configured under the 'protocols dot1x' interface hierarchy on an EX Series switch? (Choose two) -> wait, prompt says Which THREE, let's select three: supplicant timeout, max-retries, and guest-vlan.
You are deploying 802.1X on an EX4300 access switch. The authentication server is a Juniper Networks Steel-Belted Radius (SBR) Enterprise server. You want the switch to accept authenticated supplicants only if the RADIUS server returns an Access-Accept that includes the Filter-Id attribute with the value 'employee'. Which Junos configuration element on the EX switch is required to enforce this behavior?
You manage an EX4300 switch that enforces 802.1X on an access port. Users complain they must wait about 60 seconds after plugging in before the port becomes authenticated. You have already verified the RADIUS server responds in under one second. Which setting should you tune to reduce this delay?
You are deploying 802.1X on an EX Series switch. The RADIUS server returns the Filter-Id attribute with a value of 'restricted' after successful authentication. You want the switch to apply a specific set of CoS and firewall filters based on this attribute. Which configuration element must you define on the switch to map the Filter-Id value to the desired policies?
You are configuring MAC RADIUS authentication on an EX Series switch. You want to ensure that the switch sends both the MAC address and the interface name to the RADIUS server during authentication. Which TWO statements are correct about the RADIUS Access-Request packet generated by the switch in this scenario? (Choose two.)
You are configuring MAC RADIUS authentication on an EX4300 switch. A PC connects to interface ge-0/0/10 and its MAC address is not in the RADIUS server database, so authentication fails. You want the switch to place the interface into a restricted VLAN where the user can only access a remediation server. Which Junos OS feature should you configure to achieve this?
You are configuring an EX Series switch to use 802.1X with EAP-TLS. The RADIUS server is configured to return a Filter-Id attribute containing the name of an egress firewall filter. The switch receives the attribute but does not apply the filter to the authenticated user's traffic. Which action must you take to ensure the filter is applied?
An EX Series switch is configured with 802.1X on ge-0/0/10. A VoIP phone that supports 802.1X is attached, and a PC is daisy-chained behind the phone. You want the phone authenticated via 802.1X and the PC authenticated via MAC RADIUS on the same physical port. Which configuration element is required to support this?
You are configuring 802.1X authentication on an EX Series switch. You want to ensure that the switch sends the correct NAS-Identifier and NAS-Port-Type attributes in RADIUS Access-Request messages. Which two statements are true about these attributes on Junos? (Choose two.)
You are configuring 802.1X on an EX Series switch. You want to allow supplicants that do not support 802.1X to be authenticated via MAC RADIUS as a fallback. You also want to ensure that if the RADIUS server is unreachable, the switch places the port in a VLAN that provides limited access. Which configuration accomplishes this?
You are configuring an EX Series switch to support 802.1X authentication with dynamic VLAN assignment. The RADIUS server returns Tunnel-Type, Tunnel-Medium-Type, and Tunnel-Private-Group-ID attributes. Which two statements are correct about how the switch processes these attributes? (Choose two.)
You are configuring an EX Series switch to use MAC RADIUS authentication. You want the switch to send accounting start and stop records to the RADIUS server for each authenticated MAC address. Which configuration step is required?
You are troubleshooting an EX Series switch where 802.1X authentication fails for a specific client. The switch logs show 'EAPOL packet received but no response from RADIUS server'. You verify that the RADIUS server is reachable and other clients authenticate successfully. Which action should you take to resolve the issue?
What is the primary function of the RADIUS server attribute 'Tunnel-Medium-Type' (Attribute 65) when received during an 802.1X authentication exchange on an EX Series switch?
An enterprise network administrator needs to configure 802.1X authentication on EX Series switches. Which statement is correct regarding the default behavior of the supplicant timeout timer?
You are configuring a captive portal on an EX Series switch. You want to ensure that specific management traffic and critical server subnets are accessible to clients *before* they authenticate through the captive portal. Which configuration feature accomplishes this?
An EX Series switch is configured with 802.1X and MAC RADIUS. A client device connects that does not support 802.1X. The switch attempts 802.1X, times out, and successfully falls back to MAC RADIUS. However, the administrator notices a significant delay (several seconds) before the MAC RADIUS request is sent to the server. What parameter should be tuned to reduce this delay?
An EX4300 switch is configured with captive portal authentication. Unauthenticated users are successfully redirected when attempting HTTP traffic, but HTTPS traffic fails to redirect properly and instead shows a certificate warning or connection timeout in the user's browser. What is the fundamental reason for this behavior with standard captive portal implementations?
You are troubleshooting an issue where an 802.1X supplicant on a Windows client fails to connect to an EX Series switch port. The switch logs show 'EAPOL-TIMEOUT' errors. What does this error indicate?
An enterprise network uses 802.1X authentication with dynamic VLAN assignment on EX Series switches. A client authenticates, and the RADIUS server returns both a VLAN name and a set of dynamic firewall filter names via RADIUS attributes (Filter-Id). When the client connects, the VLAN assignment works perfectly, but the firewall filters are not applied to the interface. What is the most likely cause?
Which TWO options are valid authentication methods that can be specified in the 'authentication-order' statement on an EX Series switch interface? (Choose two)
Which THREE statements describe the behavior of critical authentication (fallback) when a RADIUS server becomes unreachable on an EX Series switch? (Choose three)
You are deploying 802.1X on an EX Series switch. The security team requires that if the RADIUS server is unreachable during authentication, endpoints that were previously authenticated on a port must not lose network access, but new endpoints must be denied. Which action should you configure under the authenticator's interface to meet this requirement?
You are deploying 802.1X on an EX4300 access port facing a conference room. The security team wants to prevent a user from unplugging an authenticated IP phone and plugging in an unauthorized laptop on the same port. You configure MACsec on the port. Which statement describes the security benefit that MACsec provides in this scenario?
You are troubleshooting an EX Series switch where 802.1X authentication is failing for all users. The RADIUS server is reachable and the shared secret matches. Users report that authentication never completes and the switch logs show EAPOL exchanges starting but no Access-Request being sent. Which Junos command should you use to view the current 802.1X authentication state and counters on the interface?
You are enabling 802.1X on an EX Series switch. You want to allow a PC that does not support 802.1X to access the network after a user opens a web browser and authenticates. Which feature should you configure on the switch?
You are deploying 802.1X on an EX Series switch and want to ensure that when a supplicant fails authentication, it is placed into a VLAN that provides limited access to a remediation server. Which TWO Junos configuration elements are required to support this behavior? (Choose two.)
You are configuring captive portal on an EX Series switch. Users must be redirected to an external web server for authentication. You have configured the captive portal profile with the redirect URL. However, users are not being redirected and can access the Internet without authentication. Which configuration issue is most likely?
You are configuring an EX Series switch to support 802.1X authentication with multiple supplicants on a single interface. A hub connects three devices to interface ge-0/0/5. You want each device to be authenticated individually and placed into its assigned VLAN. Which configuration is required to support this?
You are configuring an EX Series switch to authenticate users via 802.1X. The RADIUS server returns a Filter-Id attribute of 'student-acl' in the Access-Accept. You want the switch to apply a firewall filter named 'student-acl' to the authenticated user's traffic. Which configuration is required on the switch?