Chapter 05 Exam Review CCNA Discovery 01 – Computer and Network Fundamentals Presented by: Phillip Place Cisco Academy Instructor Lake Michigan College Benton Harbor Michigan On the web: cis140lmc.g-school.net © 2011 G-Tech Educational Services

Q How many bits make up an IPv4 Address? A 32 Bits

Q Which portion of an IP address identifies a specific device? A The host portion.

Q A host addressed as 172.32.80.22 will belong to what network? A 172.32.0.0

Q What is the subnet mask that provides the largest number of hosts? A 255.0.0.0

Q How many bits can be used for a default class B host IP address? A 16 bits

Q How many IP addresses can be used on a default class C network? A 256

Q How many host IP addresses are available in a default class C network? A 254

Q Using a default mask, what portion of this address is the network portion: 175.180.225.193 A 175.180

Q A A single or specific host address is used In a unicast packet, which type of destination IP address is used? A A single or specific host address is used

Q What does the destination MAC address look like in a multicast frame? A It begins with 01:00:5E

Q What does the destination MAC address look like in a broadcast frame? A FF:FF:FF:FF:FF:FF

Q A Talking on the phone Ordering food at the drivethru Give examples of unicast messages? A Talking on the phone Ordering food at the drivethru Passing a note in class

Q A A corresponding MAC and IP address for the destination host. In Ethernet, what must a unicast message have in order to be successfully delivered? A A corresponding MAC and IP address for the destination host.

Q In the default DHCP environment, what happens to an IP address once the lease expires? A It if returned to the pool of addresses and can be assigned to a different host.

Q What is DHCP? A Dynamic Host Control Protocol

Q What technology is used to Dynamically assign network connection configuration settings to a host? A DHCP

Q A What are the steps in the DHCP process? Host requests an IP address through a broadcast message to the network If there is a valid DHCP server on the network it will reply with an offer The client send a message back to the DHCP server accepting the offer The DHCP server records the MAC and new IP information and sends confirmation of the lease to the client A

Q In this diagram, which IP address would the client use as the default gateway? 10.10.20.254 200.159.20.1 10.10.20.1 A 10.10.20.254

Q A What are benefits of private addresses? Eases the problem of limited IPv4 public addresses Prevents private traffic from being routed publically Allows for scalable IP network infrastructure

Q A What are benefits of NAT? Prevents external access or detection of internal IP addressing or systems Allows multiple internal systems to share a single public IP Eases the problem of limited IPv4 public addresses Allows for greater control and filtering of Internet traffic

Q A What network traffic is affected by NAT? Only traffic leaving the network is affected by NAT.

Q If a network’s router has Network Address Translation enabled, how is host to host communication affected? A It is not so long as that communication never leaves the network.

Q A What is the IP Class A private address range? 10.0.0.0 – 10.255.255.255

Q A What is the IP Class B private address range? 172.16.0.0 – 172.31.255.255

Q A What is the IP Class C private address range? 192.168.0.0 – 192.168.255.255

Q What is the default subnet mask for a Class A network? A 255.0.0.0

Q What is the default subnet mask for a Class B network? A 255.255.0.0

Q If I were designing a small network of less than 20 hosts, what would my IP addresses most likely look like? A 192.168.*.* - Class C Private

Q You are creating a massive network with the potential of hundreds of hosts. Knowing you may need room for further expansion, what would you use for the IP addressing? A 10.*.*.* - Class A Private

Q The problem is not physical, yet the client cannot ping the server. Why? IP: 192.168.110.35 SM: 255.255.255.0 GW: 192.168.110.254 IP: 192.168.110.254 A IP: 192.168.111.34 SM: 255.255.255.0 GW: 192.168.110.254 The server is on the wrong network

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