NETWORK SERVICES, ARCHITECTURES, CLOUD CONCEPTS & DEVICES

Which of the following DNS concepts dictates how long a DNS server or client might cache DNS name resolution information?

• Increment duration

• Hop count

• TTL

• Backoff timer

Which component of NTP is a measure of how far the NTP client is from the server?

• Metric

• Administrative distance

• Stratum

• MED

What type of DNS message is often used to perform reverse lookups?

• SRV

• TXT

• MX

• PTR

Which of these set the lease duration for a DHCP server that is servicing many clients in a network?

• Scope Options

• Zone Record

• Relay Agent

• DHCP Forwarder

What is the name of the DHCP message that a client send when it needs to obtain IP address information in the first step of the four-way DHCP process?

• DHCP Discover

• DHCP Request

• DHCP Offer

• DHCP Ack

Which port/protocol is used by NTP

• TCP/80

• UDP/123

• HTTPS/443

• TFTP/69

BGP is an example of a technology found in what layer/plane of operation?

• Control

• Data

• Policy

• Management

Which of these is an example of east-west traffic flow in a modern data center?

• Client requesting email from a datacenter SaaS email solution

• Container requesting services from another container in the solution

• Client uploading large number of archive files for storage

• Client downloading large number of archive files from a SAN

How does CISCO ACI spine and leaf model implement connectivity?

• By connecting each leaf device to another leaf device

• By connecting each spine device to another spine device

• By connecting each leaf device to each spine device

• By connecting each spine device to every other spine device

The cloud characteristic ability to dynamically scale resources as needed during high and low demand.

• Multitenancy

• Rigidity

• Elasticity

• Security