30 Questions
What type of DNS record is used to map a domain name to the IP address (Version 6) of the computer hosting the domain?
AAAA
What is the purpose of the NS record in DNS?
To link to the domain names authoritative nameservers
What does the Canonical Name record (CNAME) do in DNS?
Tells anyone visiting that subdomain to use the same DNS records as another domain / subdomain
What type of DNS record is used to support reverse name lookups?
PTR
What type of DNS record associates the domain serial number with its owner?
SOA
What is the main difference between an AAAA record and an A record?
One is used for IPv4 and the other is used for IPv6
What is the primary function of southbound APIs in SDN?
To enable communication between the controller and the network device
What is the severity level of syslog that logs informational messages?
4
Which interface is used to send traffic to the destination network 10.18.75.113/27?
G0/6
What is the purpose of the advertised distance in EIGRP?
To inform the local router of the bandwidth on the link
Which of the following is a characteristic of the best route in EIGRP?
Lowest AD and lowest metric
What is the role of the reported distance in EIGRP?
To multiply the delay on the exiting interface by 256
What is a requirement for two routers to become neighbors?
All of the above
What is the next step after the neighboring process?
Adjacency
What is exchanged between adjacent routers?
Database information
How do routers become neighbors?
By agreeing on several parameters
What is sent periodically out of each interface using IP multicast?
Hello packets
What is the purpose of the Hello protocol?
To facilitate neighbor election
What is the purpose of the serial number in a DNS zone file?
To show the revision history of the DNS zone file
What is the recommended format for the serial number in a DNS zone file?
YYYYMMDDnn
How often will a slave DNS server refresh from the master DNS server with a refresh time of 86000?
Every 86,000 seconds
What is the purpose of the refresh time in a DNS zone file?
To specify how often the slave DNS server will poll the master DNS server
How should the email address of the domain administrator be written in a DNS zone file?
root.ns.nameserver.com
What is the recommended time range for the refresh time in a DNS zone file for a regular Internet server?
Between 6 to 24 hours
What is the function of a name resolver?
To query a name server for IP address information
What is the purpose of a local database of address mappings?
To improve DNS query performance
What does the 'no ip domain-lookup' command do on a Cisco device?
Disables DNS services
What are two benefits of using private IPv4 addressing?
They provide a layer of security from Internet threats and alleviate the shortage of public IPv4 addresses
What is the function of Cisco Advanced Malware protection for next-generation IPS?
Inspecting specific files and files types for malware
What component of a URL indicates the location or organization type?
Domain
Identify the correct steps to troubleshoot OSPF adjacency issues. Learn how modifying priority or network type can affect OSPF neighbor relationships and adjacency.
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