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Exam (elaborations)

CNIT 344 Exam 2 Graded A+ 2024

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  • CNIT 344
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  • CNIT 344

CNIT 344 Exam 2 Graded A+ 2024

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  • September 22, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • CNIT 344
  • CNIT 344
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CLOUND
CNIT 344 Exam 2 Graded A+ 2024
· Syn - initiator asks acceptor if it wants to set up a connection
· Syn-Ack - the acceptor replies with an acknowledgement to the request
· Ack - initiator acknowledges that the connecting has been established - ANSWER-
TCP 3-way handshake:

2 (MAC address) , 3 (IP address) - ANSWER-To communicate, on an internetwork, a
host needs logical knowledge of layer ? address and Layer ? address

20 - ANSWER-FTP port

23 - ANSWER-Telnet port

25 - ANSWER-SMTP port

32 bits/4 bytes - ANSWER-Key piece of the IP Packet Header, length of IPv4 header

53 - ANSWER-DNS port

67 - ANSWER-DHCP port (BootP)

69 - ANSWER-TFTP port

7 - ANSWER-Echo port

80 - ANSWER-HTTP port

Acknowledgement Number - ANSWER-TCP header field, the value of the next
sequence number expected to be received

Address resolution - ANSWER-the process of mapping a hardware address to a higher-
layer protocol address (maps IPv4 address to specific MAC address)

Address Resolution Protocol (ARP) - ANSWER-method to send a packet/frame to
another computer when the sending computer does not know the MAC address of the
receiving computer, just the IP address of it, operates at datalink layer,

Automatic Private IP Addressing (APIPA) - ANSWER-if a DHCP client is unable to
locate a DHCP server and has no other configs, the computer configures itself with a
169.254.0.0/255.255.0.0 address; the computer then checks to make sure that address
is not in use (through ARP request) and will attempt up to 10 different IP addresses

Available address pool - ANSWER-remaining viable addresses DHCP is allowed to
assign dynamically

, Bootstrap Protocol (BootP) - ANSWER-host can configure its IP parameters at boot
time, not only assigns IP, but also assigns default router and network mask, operates at
network layer

broadcast, unicast - ANSWER-An ARP request is a ?; an ARP reply is a ?

Checksum - ANSWER-a one's complement of one's complement sum of the ICMP
message in 16-bit sections

Checksum - ANSWER-TCP header field, a 16-bit one's complement of the one's
complement sum of segment

CIDR Notation - ANSWER-putting a slash after an IPv4 address that represents the
number of network bits, also known as classless routing

Code - ANSWER-in the ICMP message format, defines additional operational actions of
a specific message type

Control fields - ANSWER-TCP header field, contains the flags (SYN, ACK, FIN, etc.)

Data Offset - ANSWER-TCP header field, the number of 32-bit words in the TCP
header, indicates where the data begins

Default gateway - ANSWER-the address of the router interface, must be on the same
network as all of the hosts

DHCP - ANSWER-a framework for passing configuration information to hosts on a
TCP/IP network, client server architecture

DHCP Reservation - ANSWER-ensures that a device will always receive the same IP
address when renewing its lease (static IPs), an IP address is set aside, or reserved, for
a specific network device that has the Media Access Control (MAC) address associated
with that IP address

DHCP Scope - ANSWER-defines a set of IP addresses and associated configuration
information that can be supplied to a DHCP client

False - it is required - ANSWER-T/F: ICMP is not required in every IP deployment

File Transfer Protocol (FTP) - ANSWER-standard mechanism provided by TCP/IP for
copying a file from one host to another

Flag and Fragment Offset - ANSWER-Key piece of the IP Packet Header, used in
reconstruction of any fragments

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