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Nexus Interview Question And Answers

What is NEXUS?

NEXUS is a bi-national, Canada-United States program for pre-approved, low-risk travellers entering Canada or the United States (U.S.) at designated air, land and marine ports of entry.

The program enables its members to enter either country more quickly and easily by using automated self-serve kiosks in the air mode of travel, dedicated lanes in the land mode of travel, and by calling Telephone Reporting Centres (TRCs) prior to arrival in the marine mode of travel.

How do I become a NEXUS member?

To become a member of NEXUS, applicants must:

submit an application and go through a registration process;

satisfy the eligibility criteria;

be admissible to Canada and the U.S.; and

pass risk assessments by both countries.

What are the benefits of using NEXUS?

NEXUS members avoid long line-ups and save time using automated self-serve kiosks at nine Canadian international airports (NEXUS Air).

As an added benefit, when travelling on domestic, U.S.-bound, and select international flights, NEXUS members can be expedited through Canadian Air Transport Security Authority (CATSA) airport security screening lanes located at 16 Canadian airports. Members must present their valid NEXUS card to access the Trusted Traveller CATSA Security Line.

Members also enjoy a quick and simplified entry process using dedicated lanes at 21 designated land border crossings.

When arriving by boat, members travelling to over 450 marine sites in Canada can report by phone to a TRC between 30 minutes and four hours before they arrive.

NEXUS allows Canadian and U.S.  border officers to focus their efforts on unknown and potentially higher-risk travelers and their goods.

Is there a fee involved to apply for NEXUS?

Yes. There is a non-refundable processing fee of $50 in Canadian or U.S. funds.

What is iris recognition biometric technology?

Iris recognition biometric technology identifies the unique patterns of the iris (the coloured ring around the pupil of the eye). The technology reads each of the 266 unique characteristics in the human iris. It is safe, secure and non-invasive.

What is the size of a NEXUS card?

A NEXUS card is approximately the same size as a standard credit card or driver’s licence.

How does NEXUS in the air mode work?

NEXUS members can use the automated kiosks located in the U.S. Preclearance area and the Canadian inspection services area at participating airports.

Members can proceed directly to the NEXUS self-serve kiosk and do not need to go through the standard queue to speak to a border services officer or CBP officer.

Members stand in front of the self-serve kiosk and look into the adjustable camera and follow the audio instructions so that their irises can be photographed using iris recognition biometric technology (see question below).

Once the CBSA or CBP has confirmed that the photo of the irises matches the one on file, the member will use the touch screen to answer standard customs and immigration questions.

NEXUS members residing in Canada can use a Traveller Declaration Card (TDC) to declare goods and pay for any duties or taxes when entering Canada. Members simply deposit a TDC in a secure TDC box conveniently located near a self-serve kiosk. Any duties or taxes owing will be collected through the credit card information provided on the TDC.

Where is NEXUS in the air mode available?

NEXUS in the air mode is available at 8 locations when entering Canada.

In addition, please note that a trusted traveller kiosk is also available at Billy Bishop Toronto City Airport, for incoming flights only for use by members of NEXUS and CANPASS Air.

Where is NEXUS in the land mode available?

NEXUS in the land mode is available at 21 locations when entering Canada

Where is NEXUS in the marine mode available?

NEXUS in the marine mode is available at approximately 450 locations when entering Canada.

Why does vPC not block either of the vPC uplinks?

Nexus 7000 has a loop prevention method that drops traffic traversing the peer link (destined for a vPC peer link) when there are no failed vPC ports or links. The rule is simple: if the packet crosses the vPC peer link, it may not go out any port in a vPC even if that vPC does not have the original VLAN.

How do I verify the features enabled on Nexus 7000 Series Switch with NX-OS 4.2?

 Issue the show feature command in order to verify.

switch-N7K# show feature

Feature NameInstanceState
tacacs1enabled
scheduler1enabled
isis2disabled
isis3disabled
isis4disabled
ospf1enabled
ospf2disabled
ospf3disabled

feature vrrpswitch-N7K# show run | I feature

feature tacacs+

feature schedule

feature ospf

Is there a tool available for configuration conversion on Cisco 6500 series to the Nexus platform?

Cisco has developed the IOS-NXOS Migration Tool for quick configuration conversion on Cisco 6500 series to the Nexus series OS.

What are orphan ports?

Orphan ports are single attached devices that are not connected via a vPC, but still carry vPC VLANs. In the instance of a peer-link shut or restoration, an orphan port’s connectivity may be bound to the vPC failure or restoration process. Issue the show vpc orphan-ports command in order to identify the impacted VLANs.

What is the minimum NX-OS release required to support FCoE in the Nexus 7000 Series Switches?

FCoE is supported on Cisco Nexus 7000 Series systems running Cisco NX-OS Release 5.2 or later.

On a Nexus, is the metric-type keyword not available in the “default-information originate” command?

On a Nexus, use a route-map command with a set clause of metric-type type-[½] in order to have the same functionality as in IOS using the default-information originate always metric-type [½] command.
For example:

switch(config)#route-map STAT-OSPF, permit, sequence 10switch(config-route-map) #match interface ethernet 1/2switch(config-route-map) #set metric-type {external | internal | type-1 | type-2}

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Nexus Interview Question And Answers
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