Lesson 5 Ports and Protocol

Question 1

set of rules that define how devices communicate on the network

Answer 1

protocol

Question 2

how many possible network ports are there

Answer 2

65, 536

Question 3

this tells the host device the type of traffic being sent and where to send it to

Answer 3

port number

Question 4

• generic method of transferring files.
• it can include usernames and passwords to provide file security.
• can allow file transfer between dissimilar computer systems.
• can transfer both binary and text files (HTML)
• preceded by ftp:// > DNS name

ports: 20, 21

Answer 4

file transfer protocol (ftp)

Question 5

what ftp port?

used to transfer control information such as authentication and file information

Answer 5

port 21

Question 6

what ftp port?

used to transfer data

Answer 6

port 20

Question 7

what protocol?

• secure interactive control of remote systems
• communications are encrypted and typically used to remotely login to a network device, such as a switch
• secure transfer of files

port: 22

Answer 7

secure shell (SSH)

Question 8

what protocol?

• remotely connect to another system
• data transmitted is in clear text
• not used often

port: 23

Answer 8

telnet

Question 9

what protocol?

used when sending email

port: 25

Answer 9

simple mail transfer protocol

Question 10

what protocol?

• provides address to name resolution
• identifies the ip address for the name www.testout.com

port: 53

Answer 10

domain name system

Question 11

what protocol?

• dynamically assign ip addressing information network hosts when they come online

port: 67, 68

Answer 11

dynamic host configuration protocol (dhcp)

Question 12

in dhcp,

the client sends request on port _____(a)

the server sends the dhcp configuration on port _______(b)

Answer 12

a. 67
b. 68

Question 13

what protocol?

• used by web browsers and web servers to exchange hypermedia (webpages) through the WWW and intranets.
• doesn’t use encryption; not secure

port: 80

Answer 13

hypertext transfer protocol (http)

Question 14

what protocol?

• used to retrieve email from a remote server to a local client over an IP connection
• email messages are downloaded to the client

port: 110

Answer 14

post office protocol 3 (pop 3)

Question 15

what protocol?

• term used to describe the combination of two protocols: NetBEUI and NetBIOS
• NetBIOS is non-routable, so it was often combined with IP to enable internetwork communications

port: 137, 139

Answer 15

network basic input/output system (NETBIOS) over TCP/IP (NetBT)

Question 16

in NetBIOS,

_____ (a) is used to establish the connection between two computers
_____ (b) is used to transfer data during the session

Answer 16

a) port 139
b) port 137

Question 17

what protocol?

• an email retrieval protocol designed to enable users to access their email from various locations without transferring messages or files between computers
• messages remain on the remote mail server and are not automatically downloaded to a client system

port: 143

Answer 17

internet message access protocol (IMAP)

Question 18

what protocol?

• used to monitor and manage network devices
• can be installed in PCs, switches, firewalls, printers, and routers
• send data to an SNMP manager on a server

port: 161, 162

Answer 18

simple network management protocol (snmp)

Question 19

in snmp,

___ (a) is used by the snmp manager to query agents
____ (b) is used by agents to send alerts to the snmp manager

Answer 19

a) 161
b) 162

Question 20

what protocol?

• network information such as usernames, passwords, computer accounts, group policies, and other user and device information are stored in a directory service such as microsoft’s active directory
• used to access this information across the network
• open source, vendor neutral protocol
• can work with other directory services, except microsoft’s active directory

port: 389

Answer 20

lightweight directory access protocol (ldap)

Question 21

what protocol?

• http over ssl
• secure form of http that uses tls to encrypt all communication

port: 443

Answer 21

hypertext transfer protocol over secure socket layer (https)

Question 22

what protocol?

• enables the sharing of folders and printers on the network
• remote users can access files in a shared folder on a server or workstation
• a remote user can send print jobs to a share printer
• implement CIFS to share data across a windows-based network

port: 445

Answer 22

server message block (smb)/common internet file system (cifs)