CCNA Routing and Switching - Network Services 100% Correct Answers!!!

NAT is responsible for translating the source IP address of a packet to use the IP of the public interface on the NAT device. - ANS Your manager asks you which service is responsible for translating the source IP address of a packet to the IP address of the public interface on the router. (A) DHCP (B) NAT (C) DNS (D) HTTP C If you can communicate with a system by the IP address but not the FQDN, it's a classic indication that the name is not able to resolve to an IP address. This is a sign that there is a problem with the DNS. - ANS You are troubleshooting a communication problem. You seem to be able to communicate with Glen's website by IP address, but not by the fully qualified domain name (). What is most likely the problem? (A) DHCP (B) NAT (C) DNS (D) HTTP A. DHCP The DHCP service is responsible for assigning IP addresses automatically to systems on the network. - ANS Which network service can be configured on your router that is responsible for assigning IP addresses to systems on the network? (A) DHCP (B) NAT (C) DNS (D) HTTP B. DNS server DNS is responsible for converting the friendly name, such as , to an IP address. - ANS What service on the network is responsible for converting the FQDN to an IP address? (A) Authentication server (B) DNS server (C) DHCP server (D) NAT A. Authentication server An authentication server is responsible for verifying the username and passwords of clients wishing to access the network. - ANS What service on the network is responsible for verifying username and passwords when the user attempts to log on? (A) Authentication server (B) DNS server (C) DHCP server (D) NAT B. FF-FF-FF-FF-FF-FF The DHCP discover message is a broadcast message which is used to locate the DHCP server on the network. FF-FF-FF-FF-FF-FF is the layer-2 representation of a broadcast address. - ANS You are monitoring network traffic and you notice a number of DHCP discover messages on the network. Which of the following is the destination address of the DHCP discover message? (A) 0F-1B-3C-2F-3C-2A (B) FF-FF-FF-FF-FF-FF (C) 192.168.4.5 (D) 192.168.0.0 B. DHCP discover The DHCP discover message is the first message sent out by a DHCP client to locate a DHCP server on the network. The DHCP discover message is a broadcast message which has a destination MAC address of FF-FF-FF-FF-FF-FF. - ANS When a client system boots up and requests an IP address, it first must send out which message? (A) DHCP request (B) DHCP discover (C) DHCP response (D) DHCP ACK C. Repeater A repeater is a layer-1 device that is responsible for regenerating the signal. - ANS What device is responsible for regenerating the signal so that the signal can travel a greater distance? (A) Bridge (B) Router (C) Repeater (D) Switch (E) Hub D. Switch A switch is a layer-2 device that filters traffic based off the destination MAC address of the frame. - ANS Which device filters traffic by looking at the destination address of the frame and then forwards the frame to the port that the destination system resides on? (A) Hub (B) Router (C) Repeater (D) Switch B. Router A router is an example of a layer-3 device and is responsible for sending or receiving information to and from the network. - ANS Which of the following is a layer-3 device? (A) Bridge (B) Router (C) Repeater (D) Switch (E) Hub D. Half-duplex When a device can send and receive information, but not at the same time, it is known as half-duplex communication. Full duplex is when the device can send and receive at the same time. - ANS A device that can send and receive information, but not at the same time, is said to be _________________. (A) Simplex (B) Full duplex (C) Multicast (D) Half-duplex D. Broadcast A broadcast message is a message sent to all systems on the network. A broadcast message has a destination MAC address of FF-FF-FF-FF-FF-FF. - ANS A message that is sent out on the network and is destined for all systems is known as a __________________ message. (A) Unicast (B) Multicast (C) Full duplex (D) Broadcast B. Multicast Multicast traffic is traffic that is destined for more than one system, but not all systems. - ANS A message that is sent out on the network and is destined for a group of systems is known as a ______________ message. (A) Unicast (B) Multicast (C) Full duplex (D) Broadcast