CNIT 34220 EXAM TF QUESTIONS WITH VERIFIED
ANSWERS
False - Answers - T/F: 192.168.1.IN-ADDR.ARPA is the typical name of the reverse
address zone for the 192.168.1.0/24 network.
True - Answers - T/F: ICANN is responsible for creating top-level domains.
False - Answers - T/F: Best practice is to use your Internet DNS domain for your Active
Directory.
True - Answers - T/F: The DNS system would take a disproportionate amount of the
Internet bandwidth if it were not for caching.
True - Answers - T/F: From a practical perspective the DNS name space is larger than
anyone should need.
True - Answers - T/F: To be considered authoritative, a DNS server must store records
persistently.
False - Answers - T/F: You must provide three DNS servers that are available 24/7 to
register a second level domain name.
reverse - Answers - PTR records should only be found in ________________ name
resolution zones.
True - Answers - T/F: Root servers should only be consulted when a DNS server
doesn't know the address of a DNS server that is authoritative for the domain in
question.
False - Answers - T/F: PTR Records are used exclusively in forward name resolution
tables.
False - Answers - T/F: DNS zones and domains are synonymous.
True - Answers - T/F: When using a relay host (forwarder), e-mail bounces can come
from the origin host, the relay host, or the destination host.
True - Answers - T/F: When using a relay host you should limit the hosts that it will
service.
False; store and forward - Answers - T/F: E-mail is a real-time communication
technique.
, False; accessing - Answers - T/F: IMAP is a means of retrieving mail on a server from a
client.
True - Answers - T/F: SMTP is used to deliver mail between hosts.
False; content filtering - Answers - Blacklisting services (MAPS, Spamhaus SBL, etc.)
typically block specific e-mail from: addresses.
True - Answers - T/F: SMTP session verification uses DNS to verify which servers
should send mail for a domain.
True - Answers - T/F: A valid e-mail address contains a user name and a DNS entry.
True - Answers - T/F: SMTP only sends one copy of a message to a destination host
regardless of how many users on the destination host are to receive the message.
False - Answers - T/F: A good spam control system should prevent user s from being
able to over-ride spam decisions.
False; retrieving - Answers - T/F: POP3 is a means of accessing mail on a server from a
loosely attached (not on the network 24/7) client.
False; seven - Answers - T/F: SMTP natively supports eight-bit data encoding.
MIME - Answers - How do you encode binary attachments for email transmission?
Multi-purpose Internet Mail Extensions - Answers - MIME
Bayesian Filter - Answers - A spam control filtering technique that learns based on what
the user thinks is spam is typically termed a ________________.
True - Answers - T/F: The main reason for spam is an lack of authentication in SMTP.
DNS Structure - Answers - host.subdomain(s).top_level_domain
- up to 127 levels of domains
- 63 characters per name
top level to lower levels - Answers - DNS Authority Hierarchy
True - Answers - T/F: InterNIC handles top level (root) domains.
Name Resolution - Answers - mapping station names back to IP addresses
hosts files - Answers - - common to both DNS host names
- on both server and users end
ANSWERS
False - Answers - T/F: 192.168.1.IN-ADDR.ARPA is the typical name of the reverse
address zone for the 192.168.1.0/24 network.
True - Answers - T/F: ICANN is responsible for creating top-level domains.
False - Answers - T/F: Best practice is to use your Internet DNS domain for your Active
Directory.
True - Answers - T/F: The DNS system would take a disproportionate amount of the
Internet bandwidth if it were not for caching.
True - Answers - T/F: From a practical perspective the DNS name space is larger than
anyone should need.
True - Answers - T/F: To be considered authoritative, a DNS server must store records
persistently.
False - Answers - T/F: You must provide three DNS servers that are available 24/7 to
register a second level domain name.
reverse - Answers - PTR records should only be found in ________________ name
resolution zones.
True - Answers - T/F: Root servers should only be consulted when a DNS server
doesn't know the address of a DNS server that is authoritative for the domain in
question.
False - Answers - T/F: PTR Records are used exclusively in forward name resolution
tables.
False - Answers - T/F: DNS zones and domains are synonymous.
True - Answers - T/F: When using a relay host (forwarder), e-mail bounces can come
from the origin host, the relay host, or the destination host.
True - Answers - T/F: When using a relay host you should limit the hosts that it will
service.
False; store and forward - Answers - T/F: E-mail is a real-time communication
technique.
, False; accessing - Answers - T/F: IMAP is a means of retrieving mail on a server from a
client.
True - Answers - T/F: SMTP is used to deliver mail between hosts.
False; content filtering - Answers - Blacklisting services (MAPS, Spamhaus SBL, etc.)
typically block specific e-mail from: addresses.
True - Answers - T/F: SMTP session verification uses DNS to verify which servers
should send mail for a domain.
True - Answers - T/F: A valid e-mail address contains a user name and a DNS entry.
True - Answers - T/F: SMTP only sends one copy of a message to a destination host
regardless of how many users on the destination host are to receive the message.
False - Answers - T/F: A good spam control system should prevent user s from being
able to over-ride spam decisions.
False; retrieving - Answers - T/F: POP3 is a means of accessing mail on a server from a
loosely attached (not on the network 24/7) client.
False; seven - Answers - T/F: SMTP natively supports eight-bit data encoding.
MIME - Answers - How do you encode binary attachments for email transmission?
Multi-purpose Internet Mail Extensions - Answers - MIME
Bayesian Filter - Answers - A spam control filtering technique that learns based on what
the user thinks is spam is typically termed a ________________.
True - Answers - T/F: The main reason for spam is an lack of authentication in SMTP.
DNS Structure - Answers - host.subdomain(s).top_level_domain
- up to 127 levels of domains
- 63 characters per name
top level to lower levels - Answers - DNS Authority Hierarchy
True - Answers - T/F: InterNIC handles top level (root) domains.
Name Resolution - Answers - mapping station names back to IP addresses
hosts files - Answers - - common to both DNS host names
- on both server and users end
