04 Flashcards
FTP (Data) protocol: Port:
TCP, 20
FTP (command/control) protocol: Port:
TCP 21
SSH Protocol: Port:
TCP 22
Telnet (Data) protocol: Port:
TCP 23
SMTP (Data) protocol: Port:
TCP 25
DNS protocol: Port:
UDP(Queries):53 TCP(Zone Transfers):53
DHCP (Data) protocol: Port:
UDP 67/68
TFTP protocol: Port:
UDP 69
HTTP protocol: Port:
TCP 80
POP3 protocol: Port:
TCP 110
IMAP4 protocol: Port:
TCP 143
SNMP protocol: Port:
UDP 161/162
LDAP protocol: Port:
TCP 389
Https protocol: Port:
TCP 443
RLOGIN protocol: Port:
TCP 513
__________ Allows us to optimize available IP addresses by specifying a different subnet mask for an ip address
Variable-length subnet masking (VLSM)
_________ Is a reliable connection-oriented Transport Layer protocol that accepts data of any length from upper-layer protocols and breaks them into segments
TCP
TCP uses a process known as ___________ to establish a logical connection prior to the transmission of data. (_____)(______,_______)(_____)
Three-way handshake
Syn Syn/Ack Ack
The ____________ is an unreliable, connectionaless protocol that does not guarantee data transmission, Since _______ is void of fields, it uses a fixed ___________
UDP , 8-byte header
Well-known port ranges?
0-1023
Registered port ranges?
1024-49151
_______ are objects that allow software to communicate and send data across a network connection via access to a computers NIC
socket
Within a netsts what does the Proto, loacl address, foriegn address, and state columns show?
Protocols
Source IP
Destination IP
State of the connection
What does each of these states in a netstat mean?
Established
Syn_sent
SYN_RECV
CLOSE
LISTEN
CLOSING
A connection has been established
Actively trying to make connection
Received a connection request
The socket is not being used
Socket is listening for incoming connections
Sockets are shutdown not all data was sent
________ is a protocol used by a host to obtain an IP address from a DHCP server Protocol____ Port#_____
DORA
DHCP UDP 67/68
Discover, Offer, Request, Acknowledge
________ Is a distributers name system that contains services to map computer names to IP addresses and IP addresses to computer names
Domain Name System (DNS)
What is a root name server?
are machines that provide root access to the root zone file, containing information on all TLDs
What is a DNS Generic TLD (gTLD)
TLDs with three or more characters, .com, .net
What is a DNS sponsored TLD (sTLD)
TLDs owned by an organization .mil
What is a DNS country code TLD (cTLD)
TLDs owned by country’s .ru .cn
__________ is a unique name used to identify a particular system in the namespace, sometimes referred too as an absolute domain name
Fully Qualified Domain Name (FQDN)
What is a portion of the domain namespace?
zone
One DNS server acts as the ______ The ___ acts as the primary DNS server, any other authoriaticve servers for the zone are termed ________
SOA, name servers
What is a forward look-up?
looking up a website using its name and the computer turning that into an IP address to follow (Ip-Name)
What is a reverse lookup?
Looking up an ip address and the computer using that to follow its name (Name-IP)
What DNS Resource records are the follwoing?
A
AAAA
CNAME
MX
SRV
PTR
Ipv4 host records
Ipv6 Host records
canonical name, alias like using another word for a command to reach somewhere
Mail exchange
Service record
Pointer record, maps IP addresses to names for reverse lookups
_____ are how a client requests the FQDN for an IP or gets an IP for a known FQDN
Protocol/port number
DNS Queries UDP/53
An _______ DNS query, the client makes additional DNS Queries
Iterative
An _______ DNS query makes quries to other DNS servers
Recursive
A DNS _____ is a server used to forward DNS queries to DNS servers outside the network
forwarder
Storing previously resolved responses to queries is called ______
caching
_________ are conducted when a primary DNS server transfers its cache/database to a secondary or back-up DNS server.
Protocol/port number
Zone transfers
TCP 53
_______ is used to send mail messages across a network and is the basis for internet email
Protocol/port number
Simple Mail Transfer Protocol
TCP 25
_________ is a protocol used to retrieve email form a mail server
protocol/port number
Post Office Protocol version 3POP3
TCP: 110
___________ is a more advanced version of POP3 and allows you to search through email/messages and orgainze them into folders
protocl/port number?
Internet message access protocol version 4
IMAP4
TCP: 143
_________ is the set of rules for exchanging files, image, sound, video, and other multimedia files form server to client (unsecured)
HTTP
TCP:80
_________ Is an extension to the HTTP protocol where the HTTP protocol rides over the secure sockets layer or transport security layer, making it more secure
Protocol/port number?
HTTPS
TCP: 443
_______ is an application layer cryptographic protocol of the TCP/IP suite capable of securing other application layer protocols
Where does it reside in the OSI model?
_____ relies upon the exchange of server certificates to negotiate encryption/decryption
SSL
Presentation
SSL
_____ is an upgrade to, and more robust SSL
TLS
_____ is a robust file manipulation application used for exchanging and manipulating files over a TCP-based computer network
Protocol/port numbers?
FTP
TCP Data:20 Command:21
What is the difference between passive and active mode in FTP?
protocol/port numbers?
Active: Pizza delivery, server send me data
Passive: Pizza takeout, I the client go to the server and pick up the data
TCP Data:20 Command:21
______ Is a simple protocol that only provides for the reading and writing of files or mail
protocol/port numbers?
Trivial File Transfer Protocol (TFTP)
UDP:69
_________ is a binary TCP/IP Application layer protocol allowing a user to establish a virtual connection with another host
telnet
TCP:23
_____ is a UNIX utility often used as an alternative to telnet which allows a user on a UNIX host to login to another UNIX host have a TCP/IP Internet internetwork
Remote Login RLogin
TCP:513
______ is a cryptographic protocol that allows data to be exchanged using a secure channel between two networked devices
Protocol/port numbers?
SSH Secure shell
TCP:22
______ is an application Layer Protocol used to structure information on a directory server (telephone/look up address)
Protocol/port numbers
Lightweight Directory Access LDAP
TCP: 389
______ is used to manage and collect statistical network data, such as performance statistics, network availability and error rates, from remote devices through polling
SNMP
UDP 161 Trap messages 162
____________ allows the management of a network device through the network or within normal communication channels
In-band management
(over the network)
__________ allows management outside of normal communication channels. This type of management is through a channel physically seperated form the network.
Out-of-band management
(Through a cable)