module group 3

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 (The POP3 protocol uses the TCP protocol with port 110 for accessing emails stored on a local 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 IMAP4 protocol to access email messages stored on a local server?

143 (The IMAP4 protocol uses the TCP protocol with port 143 for accessing emails stored on a local server)

Which number or set of numbers represents a socket?

192.168.1.1:80

Which number grouping is a valid IPv6 address? 1234:1230::1238::1299:1000:: 12aa::1298;1200::129b 1b10::1100::2001::2900::ab11::1102::0000::2900 2001:0db8:3c55:0015:1010:0000:abcd:ff13

2001:0db8:3c55:0015:1010:0000:abcd:ff13

Which IPv6 address notation is valid? 2001:0DB8::ABCD::1234 2001::ABCD:: ABCD:160D::4GAB:FFAB 2001:DB8:0:1111::200

2001:DB8:0:1111::200

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 telnet server listens on TCP port 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 (The SMTP protocol uses TCP port 25 as the destination when a client is sendint an email message using a local server.)

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

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

How many bits are in an IPv4 address?

32 bits

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

What is a well-known port address number used by DNS to serve requests?

53

A client packet is received by a server. The packet has a destination port number of 53. What service application is the client requesting?

DNS (Domain Name System)

Which protocol allows to type a domain name instead of an IP address to access the web server?

DNS (Domain Name System)

Which application protocol is used to resolve web addresses to an IP address

DNS (domain name system

What are RIRs?

Regional Internet Registries

Which protocol operates at the transport layer of the TCP/IP model and ensures reliable delivery of IP packets?

TCP

The client server relationship

TCP and shit

A client packet is received by a server. The packet has a destination port number of 69. What service application is the client requesting?

TFTP (trivial file transfer protocol)

The IP address is 192.168.1.31 and the subnet mask is 255.255.255.240 A user is configuring a pc with the IP settings as displayed, but he operating system will not accept them. What is the problem?

The IP address is not a usable host address.

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 application protocols are used to by clients to retrieve email messages?

POP (post office protocol) and IMAP (internet message access protocol

Which protocol removes messages from the server after they have been accessed by a client?

POP3 (Post Office Protocol version 3)

A client packet is received by a server. The packet has a destination port number of 110. What service application is the client requesting?

POP3 (post office protocol version 3)

What protocol header information is used at the transport layer to identify a target application?

Port number

Which transport layer info is added to both the TCP and UDP headers?

Port numbers

True or False? text messaging is only available on a smartphone?

false

True or false: 4 out of 5 RIRs no longer have enough IPv4 addresses to allocate to customers on a regular basis.

false

What type of IPv6 address is FE80::1?

link-local

What is an advantage of using IPv6 ?

more addresses for networks and hosts

Which windows command would display the protocols in use, the local address and port numbers, the foreign address and port numbers, and the connection state?

netstat

Who is responsible for statically assigning IP addressing information?

network administrator

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 two types of devices are typically assigned static IP addresses?

web servers and printers

What type of port number is assigned by IANA to commonly used services and applications

well-known port

What statement is true about DHCP operation?

when a device is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.

When analog voice signals are converted for use on a computer network, in what format are they encapsulated?

IP packets

IPv4 and IPv6 address management

IPv4 and IPv6

Assume a host with IP address 10.1.1.10 wants to request web services from a server at 10.1.1.254. what would display the correct socket pair?

10.1.1.10:1099, 10.1.1.254:80

What two characteristics describe an FTP connection?

- Files can be downloaded from or uploaded to the server - The first connection established is for traffic control and the second connection is created to transfer a file.

For two hosts, each on a different network, which of the following statements are true (choose three.) -Both hosts will have the same MAC address -Both hosts will have the same IP address -Both hosts will have the same default gateway address -Both hosts will have different MAC addresses -Both hosts will have different IP addresses -Both hosts will have different default gateway addresses

-Both hosts will have different MAC addresses -Both hosts will have different IP addresses -Both hosts will have different default gateway addresses

For two hosts that are on the same network, which of the following statements are true? (choose three.) -Both hosts will have the same MAC address -Both hosts will have the same IP address -Both hosts will have the same default gateway -Both hosts will have different MAC addresses -Both hosts will have different IP addresses -Both hosts will have different default gateway addresses ​

-Both hosts will have the same default gateway -Both hosts will have different MAC addresses -Both hosts will have different IP addresses

Which application protocol is used to automatically configure IP addressing info?

DHCP

what protocol is responsible for automatically assigning IP addressing information?

DHCP

A client packet is received by a server. The packet has a destination port number of 67. What service application is the client requesting?

DHCP (dynamic host configuration protocol)

What message will a client send to the DHCP server if he needs a an IPv4 address?

DHCPDISCOVER

What message does the DHCP server respond with to the client that

DHCPOFFER

What message does the DHCP server use to respond to the clients DHCPREQUEST message?

DHCPPACK

What message does the client send to the DHCP server to ask for permission to use the suggested IPv4 address?

DHCPREQUEST

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?

DHCPREQUEST and DHCPDISCOVER

Application layer services

Dns, FTP and shit

Which techniques use native IPv6 connectivity?

Dual stack

DHCP

Dynamic Host Configuration Protocol

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 (internet message access protocol version 4)

A client is received by a server. The packet has a destination port number of 21. what service is the client requesting?

FTP (file transfer protocol)

True or False: The Transport Control Protocol (TCP) does not keep track of segments sent to thr destination.

False

Which protocol is used by web servers to serve up a web page?

HTTP (Hypertext transfer protocol)

Which protocol is used to transfer web pages from a server to a client device?

HTTP (Hypertext transfer protocol)

A client packet is received by a server. The packet has a destination port number of 443. What service application is the client requesting?

HTTPS (hypertext transfer protocol secure)

What numbers are IPv6 addresses represented with?

Hexadecimal numbers

A client packet is received by a server. The packet has a destination port number of 53. What service application is the client requesting?

IMAP (internet message access protocol)

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 (IM)

Feature of IMAP

It downloads a copy of email messages leaving the original server.

What is a characteristic of UDP

It provides unreliable delivery of segments

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 eliminates most address configuration errors.

Typically, which network device would be used to perform NAT for a corporate enviorment?

Router

which method of IPv6 prefix assignment relies on the prefix contained in RA messages?

SLAAC

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 25. What service application is the client requesting?

SMTP (simple mail transfer protocol)

A client packet is received by a server. The packet has a destination port number of 161. What service application is the client requesting?

SNMP (simple network management protocol)

A client packet is received by a server. The packet has a destination port number of 22. What service application is the client requesting?

SSH (secure shell)

What is the advantage of using SSH over telnet?

SSH provides secure communications to access hosts.

True or False: The User Datagram Protocol (UDO) does not use acknowledgments to track the receipt of segments.

True

Which network migration technique encapsulates IPv6 packets inside IPv4 packets to carry them over IPv4 network infrastructures?

Tunneling

Why is UDP well suited as the transport layer protocol for video applications?

UDP has low overhead.

Which port group includes port numbers for FTP, HTTP, and TFTP applications?

Well-known ports

What type of applications are best suited for using UDP?

applications that are sensitive to delay

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 motivating factor for moving to IPv6?

depletion of IPv4 addresses

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, acknowledgment.

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

What info is used by TCP to reassemble and reorder received segments?

sequence numbers

Which layer of the TCP/IP is responsible for ensuring packets are sent reliably and any missing packets are resent?

transport layer