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CNIT 240,344 Exam 2 Graded A+ 2024
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CNIT 240,344 Exam 2 Graded A+ 2024
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CNIT 240/344 Exam 2 Graded A+ 2024(T/F) a packet can be forwarded without a route? - ANSWER-false
(T/F) an error sending an ICMP message can generate another ICMP message
informing of the error - ANSWER-false
(T/F) broadcast and multicast message cannot create ICMP messages - ANSWER-true
address resolution protocol (ARP) - ANSWER-maps an IPv4 address to a MAC address
blocked port - ANSWER-forwards no traffic to other bridges or switches, only listens to
network management frames
can NAT be used as a security protocol? - ANSWER-not alone, must be paired with
firewall to provide any kind of security
classless interdomain routing (CIDR) - ANSWER-allows to specify subnet mask without
worrying about address classes, provides the most granular control of network address
space
convergence - ANSWER-when switch knows everything it needs to know, including
topology and STP
designated port - ANSWER-shortest path to the destination and forwards all packets
DHCP available address pool - ANSWER-the remaining addresses from the DHCP
scope after the exclusion ranges are applied
DHCP ports - ANSWER-67, 68
DHCP reservation - ANSWER-DHCP server sets aside an IP address that is within the
scope/pool and reserves it for a specific MAC
DHCP scope - ANSWER-a set of IP address and other information that can be given to
a DHCP client, IP address must be contiguous, if want non-contiguous IPs, must
include all the IPs, then exclude the ones that you don't want to be leased
DHCP security - ANSWER-issues verifying that a host need an IP and that the offer was
sent from server that is authoritative for the zone
DNS - ANSWER-domain name system, starts at root server and then branches down
into other domains
DNS ports - ANSWER-53
, does TCP/UDP headers contain IP addresses? - ANSWER-no, mainly only ports and
seq/ack numbers
fragmentation - ANSWER-intermediary devices/routers split up a packet when
forwarding it from one media to a media with a smaller MTU
FTP ports - ANSWER-20, 21
how is DHCP constructed - ANSWER-extends the BootP functionality of operating on
UDP 67, 68; uses a client/server architecture, adds the caapbility of additional
configuration options
how is the root switch/bridge selected? - ANSWER-via election process
how long is the forward delay timer? - ANSWER-15 seconds
how long is the max age timer? - ANSWER-20 seconds
how long is the STP hello timer? - ANSWER-2 seconds
how many network bits in class A? - ANSWER-8
how many network bits in class B? - ANSWER-16
how many network bits in class C? - ANSWER-24
how many scopes can be created per subnet? - ANSWER-one
HTTP ports - ANSWER-80
HTTPS ports - ANSWER-443
ICMP ping process - ANSWER-client sends ECHO REQUEST message (type 8 code 0)
and server responds with ECHO REPLY (type 0 code 0)
inside global address - ANSWER-the public address the host on the inside network is
assigned when it leaves the router (WAN)
inside local address - ANSWER-the address assigned to a host inside a network
instance - ANSWER-how to want to apply STP/topology
internet control message protocol (ICMP) - ANSWER-offers message to provide
feedback about network operations and delivery of datagrams, but does not make IP
reliable
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