ACTUAL CNIT 34220 Exam 1 | LATEST UPDATED| REAL EXAM QUESTIONS AND ANSWERS | 100% RATED CORRECT | 100% VERFIED | ALREADY GRADED A+

ACTUAL CNIT 34220 Exam 1 |2025-2026 LATEST UPDATED| REAL EXAM

QUESTIONS AND ANSWERS | 100% RATED CORRECT | 100% VERFIED |

ALREADY GRADED A+

Name resolution - (ANSWER)map station names back to IP addresses




Host files - (ANSWER)common to both DNS host names




DNS - (ANSWER)hierarchical naming system




Static - (ANSWER)DNS is traditionally a __________ approach (Hard coded list of names and IP Addresses,

Assumes a station always has the same IP Address, Works well with Manual or BOOTP, but not with DHCP)




Host.subdomain(s).top_level_domain - (ANSWER)DNS namespace structure




127, 63 - (ANSWER)Domains have up to _____ levels, _____ characters per domain




Authority - (ANSWER)______________ is handed down from top level to lower levels




Inter Nic - (ANSWER)manages the top level (root) domains (edu, com, gov, mil, etc.)

,Domains - (ANSWER)map back to the names used in the DNS hierarchy (purdue.edu, net.lcl)




Zones - (ANSWER)represent the methods used to manage domains




authoritative - (ANSWER)A zone is __________________ for a domain or subdomain




2 - (ANSWER)Each second level domain must have at least ______ authoritative DNS servers




Authoritative server - (ANSWER)contains actual DNS entries, must be up 24/7




Next higher level's configuration - (ANSWER)where the address for the authoritative server is listed




13 - (ANSWER)number of root name servers around the world




Recursive and iterative - (ANSWER)the two approaches to forward name resolution




Recursive - (ANSWER)approach to forward name resolution, an end node (resolver) sends a request to the name server

is obligated to supply an IP address for a DNS name

,Iterative - (ANSWER)approach to forward name resolution, when the name server consults the root hints file, and it is

pointed to the authoritative server




name servers - (ANSWER)Resolved names are cached by _______________




TTL - (ANSWER)the amount of time that a server can hold the cached data is determined by




Zone administrator - (ANSWER)who sets the TTL




DNS Zone Files - (ANSWER)file for each zone containing records




SOA (Start of Authority) - (ANSWER)DNS zone file, states that this is the definitive name server for the domain, uses a

'.' Instead of an '@' for email




NS - (ANSWER)DNS zone file, name server in the domain, identifies the name servers that are authoritative for the

zone, useful for backups, needs the FQDN of the zone and FQDN of the name server




A(ddress) Record - (ANSWER)DNS zone file, provides IP address of for each of the hosts that you want to make

accessible via DNS

, MX Record - (ANSWER)DNS zone file, mail exchange, indicates that mail addressed to a domain name should be

forwarded to another host, identify the mail server for a domain




HINFO - (ANSWER)DNS zone file, host info record, machine type, operating system, serial number




WKS (well-known service record) - (ANSWER)DNS zone file, address, protocol, and service provided by a host




CNAME (Canonical Name) Record - (ANSWER)DNS zone file, stores nickname for a host, creates an alias for a FQDN




TXT - (ANSWER)DNS zone file, documentation file




Reverse DNS Resolution - (ANSWER)allows the DNS name of a known IP address to be resolved




In-addr-arpa - (ANSWER)where information on IP address in reverse order are stored




PTR records - (ANSWER)opposite of an A record, stores the FQDN for an IP address (in reverse order)




Authoritative and non-authoritative servers - (ANSWER)two types of DNS servers




Authoritative servers - (ANSWER)contain a persistent copy of the domain's records, primary and secondary server