A customer reports intermittent connectivity on a link between two EX switches. 'show interfaces ge-0/0/0' shows the interface is up, but there are increasing input errors. The link was recently changed from a 1G SFP to a 10G SFP. What is the most likely cause?

The speed and duplex are not auto-negotiating correctly.

The MTU is set differently on the two interfaces.

The fiber optic cable is damaged or the SFP is faulty.

The VLAN configuration is mismatched between the switches.

A network engineer is troubleshooting a link between two EX-series switches. The link is up at Layer 1, but no BPDUs or user traffic are passing. Both switches show the interface as up in the CLI. The engineer suspects an MTU mismatch. Which command verifies the MTU setting on the interface?

show configuration interfaces ge-0/0/0

show ethernet-switching interface

show interfaces ge-0/0/0 extensive

Which statement accurately describes the configuration of an access port versus a trunk port on a Juniper EX Series switch?

An access port is assigned to a single VLAN using the 'port-mode access' statement, while a trunk port uses 'port-mode trunk' and an 'allowed-vlan' list to carry multiple VLANs.

Access ports are configured with 'port-mode access' and an 'allowed-vlan' list, while trunk ports use 'port-mode trunk' and a single 'vlan' membership.

Both access and trunk ports are configured with 'port-mode trunk', but access ports use the 'native-vlan' statement to limit traffic to one VLAN.

An access port uses 'port-mode trunk' to carry multiple VLANs, while a trunk port uses 'port-mode access' to carry a single VLAN.

A host connected to an access port cannot communicate with other devices in the same VLAN. Which configuration is the most likely cause?

The access port is assigned to the wrong VLAN.

The trunk port is configured with the wrong allowed VLAN list.

The VLAN is not named correctly.

The interface MTU is set too high.

A customer reports that they cannot ping a server on the other side of a Layer 2 network. The link between the two switches is up, and 'show vlans' on both switches shows the correct VLAN. However, 'show interfaces ge-0/0/0' on one switch shows 'input errors' increasing. What is the most likely cause?

The VLAN is not configured on the server's switch.

The interface is configured with the wrong speed or duplex.

The VLAN is not in the allowed-vlan list on the trunk port.

The MTU is set differently on the two switches.

Juniper NetworksCertified Specialist, Service Provider Routing and Switching (JNCIS-SP)

Domain 5Objective 9

Configure, Monitor, or Troubleshoot Interfaces, Ports, and VLANs JN0-364 Practice Questions (Page 1)

Part of the Layer 2 Bridging and VLANs domain, which makes up ~11% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–7 in this domain), expect 1–1 from this objective — we provide 11 practice questions to prepare you well beyond it. (estimate)

11questions here

3free pages

5concepts

Questions 1–5

1expert · hard
A customer reports intermittent connectivity on a link between two EX switches. 'show interfaces ge-0/0/0' shows the interface is up, but there are increasing input errors. The link was recently changed from a 1G SFP to a 10G SFP. What is the most likely cause?
Select an answer first
2application · medium
A network engineer is troubleshooting a link between two EX-series switches. The link is up at Layer 1, but no BPDUs or user traffic are passing. Both switches show the interface as up in the CLI. The engineer suspects an MTU mismatch. Which command verifies the MTU setting on the interface?
Select an answer first
3foundation · medium
Which statement accurately describes the configuration of an access port versus a trunk port on a Juniper EX Series switch?
Select an answer first
4foundation · easy
A host connected to an access port cannot communicate with other devices in the same VLAN. Which configuration is the most likely cause?
Select an answer first
5expert · hard
A customer reports that they cannot ping a server on the other side of a Layer 2 network. The link between the two switches is up, and 'show vlans' on both switches shows the correct VLAN. However, 'show interfaces ge-0/0/0' on one switch shows 'input errors' increasing. What is the most likely cause?
Select an answer first

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