IP Services Flashcards
Which network protocols does DNS use? (Choose two).
A. TCP
B. TFTP
C. FTP
D. SCP
E. UDP
Which network protocols does DNS use? (Choose two).
** A. TCP**
B. TFTP
C. FTP
D. SCP
E. UDP
DNS can use either the User Datagram Protocol (UDP) or Transmission Control Protocol (TCP) with a destination port of 53.
DNS servers provide what service?
A. They map individual hosts to their specific IP addresses.
B. Given an IP address, they determine the name of the host that is sought.
C. They run a spell check on host names to ensure accurate routing.
D. The convert domain names into IP addresses.
DNS servers provide what service?
A. They map individual hosts to their specific IP addresses.
B. Given an IP address, they determine the name of the host that is sought.
C. They run a spell check on host names to ensure accurate routing.
D. The convert domain names into IP addresses.
Which protocol should be used to establish a secure terminal connection to a remote network device?
A. SSH
B. ARP
C. Telnet
D. SNMPv2
E. SNMPv1
f. WEP
Which protocol should be used to establish a secure terminal connection to a remote network device?
A. SSH
B. ARP
C. Telnet
D. SNMPv2
E. SNMPv1
F. WEP
Which statement is correct regarding the operation of DHCP?
A. A DHCP server uses a gratuitous ARP to detect DHCP clients.
B. If an address conflict is detected, the address removed from the pool for an amount of time configurable by the administrator.
C. A DHCP client uses a ping to detect address conflicts. D. A DHCP client uses a gratuitous ARP to detect DHCP server.
E. If an address conflict is detected, the address is removed from the pool and will not be reused until server is rebooted.
F. If an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.
Which statement is correct regarding the operation of DHCP?
A. A DHCP server uses a gratuitous ARP to detect DHCP clients.
B. If an address conflict is detected, the address removed from the pool for an amount of time configurable by the administrator.
C. A DHCP client uses a ping to detect address conflicts. D. A DHCP client uses a gratuitous ARP to detect DHCP server.
E. If an address conflict is detected, the address is removed from the pool and will not be reused until server is rebooted.
F. If an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.
Which statement describes the process of dynamically assigning IP addresses by the DHCP server?
A. Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
B. Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.
C. Addresses are permanently assigned so that the hosts use the same address at all time.
D. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreements.
Which statement describes the process of dynamically assigning IP addresses by the DHCP server?
A. Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
B. Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.
C. Addresses are permanently assigned so that the hosts use the same address at all time.
D. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreements.
When a DHCP server is configured, which two IP addresses should never be assignable to hosts? (Choose two).
A. Broadcast address on the network.
B. Manually assigned address to the clients.
C. IP address used by the interfaces.
D. Designated IP address to the DHCP server.
E. IP address leased to the LAN.
F. Network or subnetwork IP address.
When a DHCP server is configured, which two IP addresses should never be assignable to hosts? (Choose two).
A. Broadcast address on the network.
B. Manually assigned address to the clients.
C. IP address used by the interfaces.
D. Designated IP address to the DHCP server.
E. IP address leased to the LAN.
F. Network or subnetwork IP address.
Which two tasks does the Dynamic Host Configuration Protocol perform? (Choose two).
A. Configure IP address parameters from a DHCP server to a host.
B. Set the IP gateway to be used by the network.
C. Perform host discovery by using DHCPDISCOVER messages.
D. Assign and renew IP addresses from the default pool. E. Monitor IP performance using the DHCP server.
F. Provide an easy management of layer 3 devices.
Which two tasks does the Dynamic Host Configuration Protocol perform? (Choose two).
**A. Configure IP address parameters from a DHCP server to a host. **
B. Set the IP gateway to be used by the network.
C. Perform host discovery by using DHCPDISCOVER messages.
D. Assign and renew IP addresses from the default pool. E. Monitor IP performance using the DHCP server.
F. Provide an easy management of layer 3 devices.
What is the first step in the NAT configuration process?
A. Define inside and outside interfaces.
B. Define public and private IP addresses.
C. Define IP address pools.
D. Define global and local interfaces.
What is the first step in the NAT configuration process?
A. Define inside and outside interfaces.
B. Define public and private IP addresses.
C. Define IP address pools.
D. Define global and local interfaces.
Which of the following are true statements regarding the NAT definition? (Choose two).
A. Inside local = Name of the inside source address before translation
B. Outside local = Name of the outside interface address after translation
C. Inside global = Name of the inside DMZ address host after translation
D. Outside global = Name of the outside destination host before translation
Which of the following are true statements regarding the NAT definition? (Choose two).
A. Inside local = Name of the inside source address before translation
B. Outside local = Name of the outside interface address after translation
C. Inside global = Name of the inside DMZ address host after translation
D. Outside global = Name of the outside destination host before translation
Cisco defines these terms as:
Inside local address—The IP address assigned to a host on the inside network. This is the address configured as a parameter of the computer OS or received via dynamic address allocation protocols such as DHCP. The address is likely not a legitimate IP address assigned by the Network Information Center (NIC) or service provider.
Inside global address—A legitimate IP address assigned by the NIC or service provider that represents one or more inside local IP addresses to the outside world.
Outside local address—The IP address of an outside host as it appears to the inside network. Not necessarily a legitimate address, it is allocated from an address space routable on the inside.
Outside global address—The IP address assigned to a host on the outside network by the host owner. The address is allocated from a globally routable address or network space.
Which two statements about static NAT translations are true? (Choose two).
A. They are always present in the NAT table
B. The allow connections to be initiated from the outside C. They require no inside or outside interface marking because addresses are statically defined
D. They can be configured with access-lists, to allow two or more connections to be initiated from the outside
Which two statements about static NAT translations are true? (Choose two).
A. They are always present in the NAT table
B. The allow connections to be initiated from the outside C. They require no inside or outside interface marking because addresses are statically defined
D. They can be configured with access-lists, to allow two or more connections to be initiated from the outside
In the configuration of NAT, what does the keyword overload signify?
A. If the number of available IP addresses is exceeded, excess traffic will use the specified address pool.
B. When the bandwidth is insufficient, some hosts will not be allowed to access network translation.
C. Multiple internal hosts will use one IP address to access external network resources.
D. The pool of IP addresses have been exhausted.
In the configuration of NAT, what does the keyword overload signify?
A. If the number of available IP addresses is exceeded, excess traffic will use the specified address pool.
B. When the bandwidth is insufficient, some hosts will not be allowed to access network translation.
C. Multiple internal hosts will use one IP address to access external network resources.
D. The pool of IP addresses have been exhausted.
By adding the keyword “overload” at the end of a NAT statement, NAT becomes PAT (Port Address Translation). This is also a kind of dynamic NAT that maps multiple private IP addresses to a single public IP address (many-to-one) by using different ports.
What will happen if a private IP address is assigned to a public interface connected to an ISP?
A. Addresses in a private range will be not routed on the internet backbone.
B. Only the ISP router will have the capability to access the public network.
C. The NAT process will be used to translate this address into a valid IP address.
D. A conflict of IP addresses happens, because other public routers can use the same range.
What will happen if a private IP address is assigned to a public interface connected to an ISP?
**A. Addresses in a private range will be not routed on the internet backbone. **
B. Only the ISP router will have the capability to access the public network.
C. The NAT process will be used to translate this address into a valid IP address.
D. A conflict of IP addresses happens, because other public routers can use the same range.
By default, routers do not forward any traffic from the private IP range as defined by RFC 1918. Addresses in the 10/8, 172.16/12, and 192.16/16 will not be routed to an interface with a public IP address.
When is it necessary to use a public IP address on a routing interface?
A. Connect a router on a local network.
B. Connect a router to another router.
C. Allow distribution of routes between networks.
D. Translate a private IP address.
E. Connect a network to the internet.
When is it necessary to use a public IP address on a routing interface?
A. Connect a router on a local network.
B. Connect a router to another router.
C. Allow distribution of routes between networks.
D. Translate a private IP address.
E. Connect a network to the internet.
What are two benefits of using NAT? (Choose two).
A. NAT facilitates end-to-end communication when IPsec is enabled.
B. NAT protects network security because private networks are not advertised.
C. NAT eliminates the need to re-address all hosts that require external access.
D. NAT conserves addresses through host MAC-level multiplexing.
E. NAT accelerates the routing process because no modifications are made on the packets.
F. Dynamic NAT facilitates connections from the outside network.
What are two benefits of using NAT? (Choose two).
A. NAT facilitates end-to-end communication when IPsec is enabled.
B. NAT protects network security because private networks are not advertised.
C. NAT eliminates the need to re-address all hosts that require external access.
D. NAT conserves addresses through host MAC-level multiplexing.
E. NAT accelerates the routing process because no modifications are made on the packets.
F. Dynamic NAT facilitates connections from the outside network.
Identify the advantages of using NAT. (Choose four).
A. Conserves legally registered addresses.
B. Translation introduces switching path delays.
C. Remedies address overlap occurrence.
D. Causes loss of end-to-end IP traceability.
E. Increases flexibility when connecting to the internet.
F. Certain applications will not function with NAT enabled. G. Eliminates address renumbering as network changes.
Identify the advantages of using NAT. (Choose four).
A. Conserves legally registered addresses.
B. Translation introduces switching path delays.
C. Remedies address overlap occurrence.
D. Causes loss of end-to-end IP traceability.
E. Increases flexibility when connecting to the internet.
F. Certain applications will not function with NAT enabled. G. Eliminates address renumbering as network changes.
Identify the disadvantages of using NAT. (Choose three). A. Conserves legally registered addresses.
B. Translation introduces switching path delays.
C. Remedies address overlap occurrence.
D. Causes loss of end-to-end IP traceability.
E. Increases flexibility when connecting to the internet.
F. Certain applications will not function with NAT enabled. G. Eliminates address renumbering as network changes.
Identify the disadvantages of using NAT. (Choose three). A. Conserves legally registered addresses.
B. Translation introduces switching path delays.
C. Remedies address overlap occurrence.
D. Causes loss of end-to-end IP traceability.
E. Increases flexibility when connecting to the internet.
F. Certain applications will not function with NAT enabled.
G. Eliminates address renumbering as network changes.
Identify the different types of NAT. (Choose three).
A. Dynamic
B. Auto-configure
C. Global
D. Static
E. Overload
Identify the different types of NAT. (Choose three).
A. Dynamic
B. Auto-configure
C. Global
D. Static
E. Overload
Dynamic NAT - private IP addresses are mapped to the pool of public IP addresses.
Static NAT - translates one private IP address to a public one. The public IP address is always the same.
NAT Overload – one public IP address is used for all internal devices, but a different port is assigned to each private IP address.
Which of the following are true statements regarding the NAT definition? (Choose two).
A. Inside global = Name of the inside host after translation.
B. Inside local = Name of the inside DMZ address before translation.
C. Outside local = Name of the destination host after translation.
D. Outside global = Name of the outside DMZ address before translation.
Which of the following are true statements regarding the NAT definition? (Choose two).
A. Inside global = Name of the inside host after translation.
B. Inside local = Name of the inside DMZ address before translation.
C. Outside local = Name of the destination host after translation.
D. Outside global = Name of the outside DMZ address before translation.
When using NAT Overload (PAT), all inside hosts get translated into what?
A. One single IP address
B. Outside global IP address
C. Inside local IP address
D. One private IP address
When using NAT Overload (PAT), all inside hosts get translated into what?
A. One single IP address
B. Outside global IP address
C. Inside local IP address
D. One private IP address
Identify the correct static NAT configuration.
A. ip nat inside static source 10.1.1.1 170.46.2.2
B. ip nat inside source static 10.1.1.1 170.46.2.2
C. ip nat static 10.1.1.1 170.46.2.2
D. ip nat inside source 10.1.1.1 170.46.2.2 static
Identify the correct static NAT configuration.
A. ip nat inside static source 10.1.1.1 170.46.2.2
B. ip nat inside source static 10.1.1.1 170.46.2.2
C. ip nat static 10.1.1.1 170.46.2.2
D. ip nat inside source 10.1.1.1 170.46.2.2 static
What command will display NAT translations on your router?
A. show ip nat
B. show ip nat /all
C. show ip nat translations
D. show ip nat transactions
What command will display NAT translations on your router?
A. show ip nat
B. show ip nat /all
C. show ip nat translations
D. show ip nat transactions
What command will display a summary of the NAT configuration and number of active translation types on your router?
A. show ip nat
B. debug ip nat translations
C. debug ip nat
D. show ip nat statistics
What command will display a summary of the NAT configuration and number of active translation types on your router?
A. show ip nat
B. debug ip nat translations
C. debug ip nat
D. show ip nat statistics