Lesson 5 Ports and Protocol Flashcards
set of rules that define how devices communicate on the network
protocol
how many possible network ports are there
65, 536
this tells the host device the type of traffic being sent and where to send it to
port number
- 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
file transfer protocol (ftp)
what ftp port?
used to transfer control information such as authentication and file information
port 21
what ftp port?
used to transfer data
port 20
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
secure shell (SSH)
what protocol?
- remotely connect to another system
- data transmitted is in clear text
- not used often
port: 23
telnet
what protocol?
used when sending email
port: 25
simple mail transfer protocol
what protocol?
- provides address to name resolution
- identifies the ip address for the name www.testout.com
port: 53
domain name system
what protocol?
- dynamically assign ip addressing information network hosts when they come online
port: 67, 68
dynamic host configuration protocol (dhcp)
in dhcp,
the client sends request on port _____(a)
the server sends the dhcp configuration on port _______(b)
a. 67
b. 68
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
hypertext transfer protocol (http)
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
post office protocol 3 (pop 3)
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
network basic input/output system (NETBIOS) over TCP/IP (NetBT)
in NetBIOS,
_____ (a) is used to establish the connection between two computers
_____ (b) is used to transfer data during the session
a) port 139
b) port 137
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
internet message access protocol (IMAP)
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
simple network management protocol (snmp)
in snmp,
___ (a) is used by the snmp manager to query agents
____ (b) is used by agents to send alerts to the snmp manager
a) 161
b) 162
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
lightweight directory access protocol (ldap)
what protocol?
- http over ssl
- secure form of http that uses tls to encrypt all communication
port: 443
hypertext transfer protocol over secure socket layer (https)
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
server message block (smb)/common internet file system (cifs)
