The Department of Defense created the DoD model which is made of four layers. What are they?
Network layer
Network access layer
Process/Application layer
Data Link Layer
Internet Layer
Host to Host Layer
The Process/Application from the DoD model is equal to what layers in the OSI model?
Application Layer
Transport Layer
Presentation Layer
Network Layer
Session Layer
The Host to Host layer from the DoD model is equal to what layer of the OSI model?
Network Access
The Network Access of the DoD model is equal to what layers of the OSI model?
Physical Layer
The DoD Process/Application Layer provides support on different applications. Which of these applications does it support?
Telnet and SSH
HTTP/HTTPS
SMTP/ SNMP
NTP and NFS
DNS, DHCP and BootP
POP, FTP, and TFTP
IPv4 and IPv6
Telnet is a protocol that its specialty is __________ ____________.
Accessing information.
Terminal Emulation.
With File Transfer Protocol (TFTP) there is no authentication.
Post Office Protocol (POP) and Internet Message Access Protocol (IMAP) provides a storage facility for incoming mail. Its only used for receiving email.
Simple Mail Transfer Protocol (SMTP) is used to spool, queue, and send email only.
What is the well known port number for FTP?
20 (FTP data) and 21 (FTP Control)
23 (FTP data) and 24 (FTP Control)
What is the well know port number for Secured Shell and Telnet
Port 19 (SSH) and Port 23 (Telnet)
Port 22 (SSH) and Port 23 (Telnet)
What is the well known port numbers for HTTP and HTTPS?
Port 80 (HTTP) and Port 442 (HTTPS)
Port 80 (HTTP) and Port 443 (HTTPS)
What is the well known port numbers for SMTP and DNS?
Port 25 (SNMP) and Port 53 (DNS)
Port 25 (SMTP) and Port 52 (DNS)
Port 25 (SMTP) and Port 53 (DNS)
DNS (Port 53) uses both TCP and UDP
What is the well known port numbers for SNMP and BOOTP/DHCP?
Port 161(SNMP) and Port 67 (BOOTP/DHCP)
Port 67 (SNMP) and Port 161 (BOOTP/DHCP)
TCP is a full duplex, ______________ protocol that uses a virtual circuit for a sesssion, and UDP is a _____________ protocol that does not provide a virtual circuit for a session.
connection-oriented, connection-less
connection-less, connection-oriented
In the Dod Model, the only protocols that the Host to Host layer provide are TCP and UDP
TCP segment format contains a 16 bit source port and 16 bit destination port. It also contains a 32 bit sequencing number (when receiving segments) and a 32 bit acknowledgment (To request the next expected data via windowing)
UDP format does not sequence nor does it use any form of windowing so no acknowledgments are expected. Also it does not create a virtual circuit. The only format for UDP is a 16 bit Source port and a 16 bit destination port. It does have a 16 bit Length field and a 16 bit Checksum field along with the data.
Ports up to 1023 are considered to be well known port numbers as defined by the RFC 3232.
In the Dod Model the Internet Layer, what are the protocols supported?
Internet Protocol (IP)
Session Protocol
Proxy ARP (Address Resolution Protocol)
Reverse Address Resolution Protocol
Logical addressing protocol
Address Resolution Protocol
Internet Control Message Protocol (ICMP)
What are the ports used in the Internet Layer's IP header to provide over to the Host to Host layer of the DoD model for both TCP and UDP?
Port 6 (TCP) and Port 17 (UDP)
Port 15 (UDP) and Port 17 (TCP)
The Protocol field in the IP header for the Host to Host (DoD) and Transport (OSI) layers can also be using protocols aside from TCP and UDP. What are the protocols?
Port 4 (IP Tunneling) Port 115 (Layer 2 Tunneling)
Port 88 (EIGRP) and Port 89 (OSPF)
Port 41 (IPv6) and Port 1 (ICMP)
What finds a hardware address from a known IP address?
Reverse Address Resolution Protocol (RARP)
Address Resolution Protocol (ARP)
What finds an IP address from its known hardware address?
This is a technique by which a device on a given network answers the ARP queries for a network address that is not on that network.
Proxy Address Resolution Protocol (ARP)
Internet Protocol (IP) is a connection-less protocol
What are port numbers used for?
Port numbers are used to transfer information from one layer to another.
Port numbers are used to identify the protocol or service that is to be used in the transmission.
The four layers of the TCP/IP Stack are 1)_________, 2) _____________, 3) ____________, 4)_____________.
Process / Application, Host to Host, Internet, Network Access
Application, Transport, Internet, Network Access
The four layers of the DOD model are 1) ___________, 2) ____________, 3)_____________, 4) _____________ .
The TCP/IP Protocol Suite is the networking model and a set of communication protocols used for the internet and similar networks.
What are the TCP/IP Protocols for the Application Layer? (Choose three)
UDP and TCP
Ethernet, and Token Ring.
Switches and Bridges
HTTP and FTP
DHCP, SMTP, and SNMP
What is the TCP/IP Stack Model protocols for the Transport Layer?
ICMP and ARP
TCP and UDP
Ethernet and Token Ring
What are the TCP/IP Model protocols for the Internet Layer? (Choose three)
RARP
SNMP
What are the TCP/IP Model Protocols for the Network Access layer? (Choose three)
Hardware Adapters
X.25 and FDDI
What two protocols uses session multiplexing?
HTTP and HTTPS
TCP uses port number ____ for FTP, and for Telnet ____ and for HTTP ______ when supporting Application layer services.
FTP=21, Telnet=25, HTTP=80
FTP=23, Telnet=21, HTTP=80
FTP=21. Telnet=23, HTTP=80
What of the following are considered "Well Known Ports"? (Choose two)
FTP=21 Telnet=23 SMTP=25
HTTP=8080
HSRP=1985
DNS=53, SNMP=161, TFTP=69
