NETWORKING EXAM 3 QUESTIONS
AND ANSWERS
Class - Answer-method of organizing available IPv4 addresses for assignment
Internet Corporation of Assigned Names and Numbers (ICANN) - Answer-responsible
for maintaining IP network address and domain name registration
Private addresses - Answer-an address that can be used for addressing LAN devices
but cannot be used on the internet
Network address Translation (NAT) - Answer-process whereby transmissions can be
routed appropriately from an outside system to internal systems with a private IP
Internet proxy servers - Answer-acts as an intermediary b/w systems to check and
validate incoming requests before passing to the server
Echo request - Answer-TCP/IP message that requests a response from the host
receiving the message
Subnetting - Answer-dividing a network address into smaller networks
Variable Length Subnet Masking (VLSM) - Answer-used instead of all subnets having
the same subnet mask
Classful network - Answer-subnetted to define the boundary for the network and host
bits
Classless inter-domain routing (CIDR) - Answer-alternate way of defining and specifying
network addresses, using format network_ address/network_ address_ bits
Request for Comment (RFC) - Answer-documents by which the internet is defined
through which internet standards are published
Port Numbers - Answer-used to identify the source of destination application during data
communication
Port 80 - Answer-Web server
Port 23 - Answer-TelNet
Socket - Answer-combination of an IP address, an associated protocol (TCP or UDP)
and a port number used for defining connections for connection oriented
communications
, Stateless address auto-configuration (SLAAC) - Answer-Allows IPv6 devices to
automatically configure their network address by sending/receiving config info from local
router
End-to-End principle - Answer-whenever possible, comm protocol operations should be
defined to occur at the endpoints of a comm system
Hop limit - Answer-number of routers a packet can transverse b/w its system of origin
and its destination
Multicasting - Answer-a system can send a single packet to multiple recipients
Fully Qualified Domain Name (FQDN) - Answer-made up of a host name prepended to
a domain suffix
Domain name - Answer-logical security boundary in a directory-based network
HOSTS - Answer-in TCP/IP, a network device
Dynamic DNS - Answer-DNS service that supports automatic DNS table updates
DNS zone - Answer-admin division of DNS names for maintaining name resolution
Authoritative - Answer-server with primary responsibility for a DNS zone to which DNS
table updates are made and used as the source for updating copies of the zone table
Zone file - Answer-DNS mapping file that contains the DNS records for a specific zone
DNS table - Answer-DNS mapping file that contains DNS records
Primary DNS server - Answer-authoritative server for a DNS zone
Secondary DNS server - Answer-a server that contains a copy of zone DB that is
periodically updated from the primary DNS server
Host record - Answer-DNS record that maps a host name to an IP address. It is the
most common type of DNS record. Also known as A record
Start of authority (SOA) record - Answer-DNS zone record that describes the zone and
the authoritative server. A zone can only have one SOA record
Mail exchange (MX) record - Answer-DNS record used to identify a mail server
Name server (NS) record - Answer-DNS record that identifies a DNS server
AND ANSWERS
Class - Answer-method of organizing available IPv4 addresses for assignment
Internet Corporation of Assigned Names and Numbers (ICANN) - Answer-responsible
for maintaining IP network address and domain name registration
Private addresses - Answer-an address that can be used for addressing LAN devices
but cannot be used on the internet
Network address Translation (NAT) - Answer-process whereby transmissions can be
routed appropriately from an outside system to internal systems with a private IP
Internet proxy servers - Answer-acts as an intermediary b/w systems to check and
validate incoming requests before passing to the server
Echo request - Answer-TCP/IP message that requests a response from the host
receiving the message
Subnetting - Answer-dividing a network address into smaller networks
Variable Length Subnet Masking (VLSM) - Answer-used instead of all subnets having
the same subnet mask
Classful network - Answer-subnetted to define the boundary for the network and host
bits
Classless inter-domain routing (CIDR) - Answer-alternate way of defining and specifying
network addresses, using format network_ address/network_ address_ bits
Request for Comment (RFC) - Answer-documents by which the internet is defined
through which internet standards are published
Port Numbers - Answer-used to identify the source of destination application during data
communication
Port 80 - Answer-Web server
Port 23 - Answer-TelNet
Socket - Answer-combination of an IP address, an associated protocol (TCP or UDP)
and a port number used for defining connections for connection oriented
communications
, Stateless address auto-configuration (SLAAC) - Answer-Allows IPv6 devices to
automatically configure their network address by sending/receiving config info from local
router
End-to-End principle - Answer-whenever possible, comm protocol operations should be
defined to occur at the endpoints of a comm system
Hop limit - Answer-number of routers a packet can transverse b/w its system of origin
and its destination
Multicasting - Answer-a system can send a single packet to multiple recipients
Fully Qualified Domain Name (FQDN) - Answer-made up of a host name prepended to
a domain suffix
Domain name - Answer-logical security boundary in a directory-based network
HOSTS - Answer-in TCP/IP, a network device
Dynamic DNS - Answer-DNS service that supports automatic DNS table updates
DNS zone - Answer-admin division of DNS names for maintaining name resolution
Authoritative - Answer-server with primary responsibility for a DNS zone to which DNS
table updates are made and used as the source for updating copies of the zone table
Zone file - Answer-DNS mapping file that contains the DNS records for a specific zone
DNS table - Answer-DNS mapping file that contains DNS records
Primary DNS server - Answer-authoritative server for a DNS zone
Secondary DNS server - Answer-a server that contains a copy of zone DB that is
periodically updated from the primary DNS server
Host record - Answer-DNS record that maps a host name to an IP address. It is the
most common type of DNS record. Also known as A record
Start of authority (SOA) record - Answer-DNS zone record that describes the zone and
the authoritative server. A zone can only have one SOA record
Mail exchange (MX) record - Answer-DNS record used to identify a mail server
Name server (NS) record - Answer-DNS record that identifies a DNS server
