Question 1
+ ARP: A PC sends packets to the default gateway IP address the first time since the PC turned on.
+ ICMP: The network administrator is checking basic IP connectivity from a workstation to a server.
+ DNS: The TCP/IP protocol stack must find an IP address for packets destined for a URL.
+ DHCP: A network device will automatically assign IP addresses to workstations.
+ ICMP: The network administrator is checking basic IP connectivity from a workstation to a server.
+ DNS: The TCP/IP protocol stack must find an IP address for packets destined for a URL.
+ DHCP: A network device will automatically assign IP addresses to workstations.
Question 2
+ NAT: A PC with address 10.1.5.10 must access devices on the Internet.
+ DHCP: Only routers and servers require static IP addresses. Easy IP administration is required.
+ DNS: A PC only knows a server as MediaServer. IP needs to send data to that server.
+ OSPF: A protocol is needed to replace current static routes with automatic route updates.
+ DHCP: Only routers and servers require static IP addresses. Easy IP administration is required.
+ DNS: A PC only knows a server as MediaServer. IP needs to send data to that server.
+ OSPF: A protocol is needed to replace current static routes with automatic route updates.
Question 3
+ SNMP: a protocol used to monitor and manage network devices
+ FTP: a reliable, connection-oriented service that uses TCP to transfer files between systems
+ TFTP: a connectionless service that uses UDP to transfer files between systems
+ DNS: a protocol that converts human-readable names into machine-readable addresses
+ DHCP: used to assign IP addresses automatically and set parameters such as subnet mask and default gateway
+ FTP: a reliable, connection-oriented service that uses TCP to transfer files between systems
+ TFTP: a connectionless service that uses UDP to transfer files between systems
+ DNS: a protocol that converts human-readable names into machine-readable addresses
+ DHCP: used to assign IP addresses automatically and set parameters such as subnet mask and default gateway
Question 4
| service password-encryption | encrypt all clear text passwords |
| line console 0 password friendS0nly | protect access to the user mode prompt |
| enable secret noWay1n4u | set privileged mode encrypted password |
| line vty 0 4 password 2hard2Guess | set password to allow Telnet connections |
| enable password uwi11NeverNo | set privileged mode clear text password |
Question 5
+ application layer: SMTP
+ transport layer: TCP
+ internet layer: IP
+ network access layer: Ethernet
+ transport layer: TCP
+ internet layer: IP
+ network access layer: Ethernet