9-12 quiz
T/F: if two hosts are on the same network both hosts will have the same default gateway address, different MAC addresses, and different IP addresses
true
T/F: the UDP (user datagram protocol) doesn't use acknowledgements to track the receipt of segments
true
What type of port number is assigned by IANA to commonly used services and applications?
well-known port
Which statement is true about DHCP operation?
when a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network
A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?
DHCP
what protocol is responsible for automatically assigning IP addressing information
DHCP
which application protocol is used to automatically configure IP addressing information
DHCP
A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server?
DHCPDISCOVER and DHCPREQUEST
A client packet is received by a server. The packet has a destination port number of 53. What service is the client requesting?
DNS
name the application protocol used to resolve web addresses to an IP address
DNS
A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?
FTP
A client packet is received by a server. The packet has a destination port number of 161. What service is the client requesting?
SNMP
What is the advantage of using SSH over Telnet?
SSH provides secure communications to access hosts
What is the well-known port address number used by DNS to serve requests?
53
Name two characteristics that describe an FTP connection
1. the first connection established is for traffic control and the second connection is created to transfer a file 2. files can be downloaded from or uploaded to the server
A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the POP3 protocol to access messages stored on the email server?
110
A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the IMAP4 protocol to access email messages stored on the local server?
143
Which number or set of numbers represents a socket?
192.168.1.1:80
Which destination IPv4 address does a DHCPv4 client use to send the initial DHCP Discover packet when the client is looking for a DHCP server?
255.255.255.255
A client device has initiated a secure HTTP request to a web browser. Which well-known port address number is associated with the destination address?
443
T/F: POP and IMAP are the application protocols used by clients to retrieve email messages
true
When analog voice signals are converted for use on a computer network, in what format are they encapsulated?
IP packets
A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?
POP3
Which protocol removes messages from the server after they have been accessed by a client?
POP3
which method of IPv6 prefix assignment relies on the prefix contained in RA messages
SLAAC
A client packet is received by a server. The packet has a destination port number of 25. What service is the client requesting?
SMTP
Which protocol operates at the transport layer of the TCP/IP model and ensures reliable delivery of IP packets?
TCP
A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?
TFTP
Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?
broadcast DHCPREQUEST
what is the most important factor for moving to IPv6?
depletion of IPv4 addresses
Which communication tool allows multiple users to communicate with each other in real time by using a smartphone application or social media site?
instant messaging
What is a characteristic of UDP?
it provides unreliable delivery of segments
what type of IPv6 address is FE80::1
link local
What protocol header information is used at the transport layer to identify a target application?
port number
Which transport layer information is added to both the TCP and UDP headers?
port numbers
give two examples of types of devices are typically assigned static IP addresses
printer and web servers
typically which network device would be used to perform NAT for a corporate event
router
What information is used by TCP to reassemble and reorder received segments?
sequence numbers
who is responsible for statically assigning IP addressing information
the network administrator
An employee of a company is attempting to remotely access a computer system using a virtual terminal (vty) session via Telnet. Which destination port number should the employee put in the remote access software being used?
23
A new employee is configuring a cell phone for company email. Once configured, what is the destination port number used when the employee sends an email from the phone?
25
A DHCP server is used to assign IP addresses dynamically to the hosts on a network. The address pool is configured with 192.168.10.0/24. There are 3 printers on this network that need to use reserved static IP addresses from the pool. How many IP addresses in the pool are left to be assigned to other hosts?
251
T/F: text messaging is only available on a smart phone
false
T/F: the TCP (transport control protocol) doesn't keep segments sent to the destination
false
Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks?
it reduces the burden on network support staff and it eliminates more addressing configuration errors
what is an advantage of using IPv6
more addresses for networks and hosts
Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?
the client randomly selects a source port number
Which characteristic describes the default gateway of a host computer?
the logical address of the router interface on the same network as the host computer
Which protocol retains a message in a mailbox on a server, even after the message is accessed by a user on a local client device?
IMAP4
Which protocol is used by web servers to serve up a web page?
HTTP
Which protocol is used to transfer web pages from a server to a client device?
HTTP
A client packet is received by a server. The packet has a destination port number of 443. What service is the client requesting?
HTTPS
A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?
IMAP
this protocol is used by a client to send email to a mail server
SMTP
A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?
SSH
Why is UDP well suited as the transport layer protocol for video applications?
UDP has a low overhead
What type of applications are best suited for using UDP?
applications that are sensitive to delay
If more than one DHCP server is available on the local network, in which order will DHCP messages be sent between a host and a DHCP server?
discover, offer, request, acknowledgement
Which of the following techniques use native IPv6 connectivity?
dual stack
which network technology allows devices to communicate using both IPv4 and IPv6 addressing at the same time?
dual stack
Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?
dynamic allocation
which layer of the TCP/IP model is responsible for ensuring packets are sent reliably and any missing packets are resent
transport layer
T/F: 2001:0db8:3c55:1010:0000:abcd:ff13 is a valid IPv6 address
true
T/F: 2001:DB8:0:1111:200 is a valid IPv6 notation
true
T/F: 4 out of 5 RIRs no longer have enough IPv4 addresses to allocate to customers on a regular basis
true
T/F: IMAP downloads a copy of email messages leaving the original on the server
true
T/F: IPv6 addresses are represented by hexadecimal numbers and IPv4 addresses are 32 bits in length
true
T/F: if two hosts are on different networks both hosts will have different MAC, IP, and default gateway addresses
true
which network migration technique encapsulates IPv6 packets inside IPv4 packets to carry them over IPv4 network infrastructures
tunneling
