Help answering job assessment

Hi, I have an open book technical assessment that I would really like some help with for a job I interviewed for. It is open book and it is not for schooling. I'm not expected to know the answers, but I would really like to turn it in as complete as possible. I have looked these up, but haven't been able to find the answers. There are 7 questions out of 50 that I'm really stuck on. I'm not asking anyone to research for me, but if anyone has the knowledge, I would like to treat you like a resource.

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A customer reports that the time of day display is incorrect on their Plain Old Telephone System (POTS) based handsets that go through a PBX. Assume that the PBX does not have NTP configured through an ethernet management card.

a. What POTS feature provides time of day updates to the PBX on a call by call basis?

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A trouble ticket has been reported through Tier I for a collection agency type customer. The customer stated that they cannot dial 800-867-5309. While investigating you find that they are sending 111-222-3333 as their outbound Caller-ID. From your test phone you dial the 800-867-5309 number and are able to successfully complete the call.

a. Given only the information above, what is the trouble?

b. How do you guide the customer through understanding the change that needs to be made?

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You are working through a trouble with a cellular backhaul customer. The cellular provider reports that RFC-2544 testing has passed and Y.1564 testing has passed but that PTP is failing and through their internal metrics they are seeing packet loss only related to IPV6, IPV4 seems to be working sufficiently.

a. What steps do you take to pinpoint the trouble?

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A customer reports that they cannot access the internet through a newly installed fiber based internet circuit with static IP addresses. You see the MAC address of their router in the layer-2 MAC address table, but you do not see an ARP entry.

a. Assuming that you have verified the edge router configuration, what is misconfigured in the customer’s router?

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What is the correct unit of measure to use when measuring light waves?

a. Dc

b. Db

c. dBm

d. dCm

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Which action does the local BGP enabled device take after sending a notification message to a remote peer?

a. It begins to send route update information.

b. It tears down the TCP session and attempts to reestablish it.

c. It waits for the remote peer to acknowledge that it is ready to receive routes.

It changes its local state to Established.

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Once the initial route exchange has been completed, how frequently does BGP automatically send route updates?

a. Every hour

b. When the configured timer expires

c. Whenever a routing policy is updated

d. As needed