OSPF Adjacency Troubleshooting

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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 (correct)
CNAME
NS
PTR

What is the purpose of the NS record in DNS?

To alias one name to another
To link to the domain names authoritative nameservers (correct)
To map a domain name to the IP address of the computer hosting the domain
To support reverse name lookups

What does the Canonical Name record (CNAME) do in DNS?

Supports reverse name lookups
Tells anyone visiting that subdomain to use the same DNS records as another domain / subdomain (correct)
Associates the domain serial number with its owner
Correlates a host name with an IP address

What type of DNS record is used to support reverse name lookups?

PTR (D) Signup and view all the answers

What type of DNS record associates the domain serial number with its owner?

SOA (C) Signup and view all the answers

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 (C) Signup and view all the answers

What is the primary function of southbound APIs in SDN?

To enable communication between the controller and the network device (C) Signup and view all the answers

What is the severity level of syslog that logs informational messages?

4 (D) Signup and view all the answers

Which interface is used to send traffic to the destination network 10.18.75.113/27?

G0/6 (B) Signup and view all the answers

What is the purpose of the advertised distance in EIGRP?

To inform the local router of the bandwidth on the link (C) Signup and view all the answers

Which of the following is a characteristic of the best route in EIGRP?

Lowest AD and lowest metric (B) Signup and view all the answers

What is the role of the reported distance in EIGRP?

To multiply the delay on the exiting interface by 256 (C) Signup and view all the answers

What is a requirement for two routers to become neighbors?

All of the above (D) Signup and view all the answers

What is the next step after the neighboring process?

Adjacency (B) Signup and view all the answers

What is exchanged between adjacent routers?

Database information (A) Signup and view all the answers

How do routers become neighbors?

By agreeing on several parameters (D) Signup and view all the answers

What is sent periodically out of each interface using IP multicast?

Hello packets (A) Signup and view all the answers

What is the purpose of the Hello protocol?

To facilitate neighbor election (C) Signup and view all the answers

What is the purpose of the serial number in a DNS zone file?

To show the revision history of the DNS zone file (D) Signup and view all the answers

What is the recommended format for the serial number in a DNS zone file?

YYYYMMDDnn (C) Signup and view all the answers

How often will a slave DNS server refresh from the master DNS server with a refresh time of 86000?

Every 86,000 seconds (D) Signup and view all the answers

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 (D) Signup and view all the answers

How should the email address of the domain administrator be written in a DNS zone file?

root.ns.nameserver.com (B) Signup and view all the answers

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 (B) Signup and view all the answers

What is the function of a name resolver?

To query a name server for IP address information (B) Signup and view all the answers

What is the purpose of a local database of address mappings?

To improve DNS query performance (C) Signup and view all the answers

What does the 'no ip domain-lookup' command do on a Cisco device?

Disables DNS services (B) Signup and view all the answers

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 (C) Signup and view all the answers

What is the function of Cisco Advanced Malware protection for next-generation IPS?

Inspecting specific files and files types for malware (D) Signup and view all the answers

What component of a URL indicates the location or organization type?

Domain (B) Signup and view all the answers