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1.

Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernet interface, what two pieces of header information are included? (Choose two.) source IP address: 192.168.10.129 source IP address: BBBB.3333.5677 source MAC address: 5555.AAAA.6666 destination IP address: 192.168.10.33 destination IP address: 192.168.10.134 destination MAC address: 9999.DADC.1234

2.

What header address information does a router change in the information it receives from an attached Ethernet interface before information is transmitted out another interface? only the Layer 2 source address only the Layer 2 destination address only the Layer 3 source address only the Layer 3 destination address the Layer 2 source and destination address the Layer 3 source and destination address

3.

What is the primary purpose of a routing protocol?
	to propagate broadcast messages
	to map IP addresses to MAC addresses
	to switch traffic to all available interfaces
	sharing network information between routers

4.

How does a router decide where the contents of a received frame should be forwarded?
	by matching destination IP addresses with networks in the routing table
	by matching the destination IP address with IP addresses listed in the ARP table
	by matching the destination MAC address with MAC addresses listed in the CAM table
	by forwarding the frame to all interfaces except the interface on which the frame was received

5.

Refer to the exhibit. A student in the Cisco network class has designed a small office network to enable hosts to access the Internet. What recommendation should the teacher provide to the student in regards to the network design? Replace the Layer 2 switch with a hub. Replace the Layer 2 switch with a router. Replace the Layer 2 switch with a bridge. Replace the Layer 2 switch with a transceiver.

6.

Which device would add security to a network by not forwarding broadcasts?
	hub
	router
	switch
	bridge
	repeater

7.

What do switches and routers use to make forwarding decisions?
	Switches and routers both use IP addresses.
	Switches and routers use both MAC and IP addresses.
	Switches use IP addresses. Routers use MAC addresses.
	Switches use MAC addresses. Routers use IP addresses.
	Switches use MAC and IP addresses. Routers use IP addresses.

8.

At which layer of the OSI model does the device reside that is functioning as the default gateway for hosts on a network?
	Layer 1
	Layer 2
	Layer 3
	Layer 4
	Layer 5
	Layer 7

9.

Which type of routing uses manual entry of information and does not scale well in large internetworks?
	interior
	exterior
	static
	dynamic

10.

Which type of routing allows routers to adapt to network changes?
	static routes
	dynamic routing
	only default routes
	No routing is necessary.

11.

How does subnetting provide some level of security in a network?
	The number of switches must increase.
	The collisions prevent the copying of data.
	The broadcasts are contained within a subnet.
	The number of host IP addresses is increased.

12.

What is the purpose of a subnet mask in a network? A subnet mask is not necessary when a default gateway is specified. A subnet mask is required only when bits are borrowed on a network. A subnet mask is used to determine in which subnet an IP address belongs. A subnet mask is used to separate the 48-bit address into the OUI and the vendor serial number.

13.

Refer to the exhibit. A newly hired technician is testing the connectivity of all hosts by issuing a ping command. The technician notices that a default gateway is not configured on all the hosts, but all hosts have connectivity between hosts, a fact which seems to confuse the technician. How would you explain the connectivity to the technician? The hosts are detecting the default gateway configured on the hub. The hosts are all in one LAN, so default gateway information is not needed. The hosts in the network only require that one host has a gateway configured. The hosts in the network would only need a gateway if a switch replaces the hub. The hosts are using broadcast to reach each other since no gateway is configured.

14.

A company is using a Class B IP addressing scheme and expects to need as many as 100 networks. What is the correct subnet mask to use with the network configuration?
	255.255.0.0
	255.255.240.0
	255.255.254.0
	255.255.255.0
	255.255.255.128
	255.255.255.192

15.

A company is planning to subnet its network for a maximum of 27 hosts. Which subnet mask would provide the needed hosts and leave the fewest unused addresses in each subnet?
	255.255.255.0
	255.255.255.192
	255.255.255.224
	255.255.255.240
	255.255.255.248

16.

Refer to the exhibit. The network administrator has assigned the internetwork of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 mask. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the workgroup server's properties to allow connectivity to the network? IP address: 192.168.10.38 subnet mask: 255.255.255.240 default gateway: 192.168.10.39 IP address: 192.168.10.38 subnet mask: 255.255.255.240 default gateway: 192.168.10.33 IP address: 192.168.10.38 subnet mask: 255.255.255.248 default gateway: 192.168.10.33 IP address: 192.168.10.39 subnet mask: 255.255.255.248 default gateway: 192.168.10.31 IP address: 192.168.10.254 subnet mask: 255.255.255.0 default gateway: 192.168.10.1

17.

Which address is a valid subnet if a 26 bit mask is used for subnetting?
	172.16.43.16
	172.16.128.32
	172.16.243.64
	172.16.157.96
	172.16.47.224
	172.16.192.252

18.

Host A is connected to the LAN, but it cannot connect to the Internet. The host configuration is shown in the exhibit. What are the two problems with this configuration? (Choose two.)
	The host subnet mask is incorrect.
	The host is not configured for subnetting.
	The default gateway is a network address.
	The default gateway is on a different network than the host.
	The host IP address is on a different network from the Serial interface of the router.

19.

Refer to the exhibit. A technician is planning an addressing scheme for a branch office as shown in the exhibit. What is the status of the intended network? The configuration will work as planned. The subnetwork mask of host A is incorrect. The default gateway of host A is a network address. The addresses on the router LAN interfaces are on the same subnetwork. The IP address of host A is on a different subnetwork than the subnetwork that the Ethernet router interface is on

20.

Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable to communicate with host 1. What is the cause of this problem? The subnet mask of host 2 is incorrect. Host 1 and host 2 are on different networks. The switch needs an IP address that is not configured. The router LAN interface and host 1 are on different networks. The IP address of host 1 is on a different network than is the LAN interface of the router.

21.

Refer to the exhibit. A network administrator is planning the addressing scheme for the LAN using 172.25.14.0/26. The hosts are to be assigned addresses 172.25.14.1 – 172.25.14.25. The LAN interface of the router is to be configured using 172.25.14.63 as the IP address. What would describe this addressing scheme?
	The LAN is being addressed properly.
	The subnet that is being assigned is not a usable subnet address.
	The router LAN interface is being assigned a broadcast address.
	The subnet mask does not allow enough host addresses in a single subnet.

22.

An IP network address has been subnetted so that every subnetwork has 14 usable host IP addresses. What is the appropriate subnet mask for the newly created subnetworks?
	255.255.255.128
	255.255.255.224
	255.255.255.240
	255.255.255.248
	255.255.255.252

23.

Which statements describe Layer 2 and Layer 3 packet address changes as the packet traverses from router to router? (Choose two.)
	Layer 3 header is removed and replaced at every Layer 3 device.
	Layer 2 and Layer 3 addresses do not change when the packet traverse.
	Layer 3 source and destination addresses do not change when the packet traverse.
	Layer 2 frame header and trailer are removed and replaced at every Layer 3 device.
	Layer 2 source and destination addresses do not change when the packet travels.

24.

Company XYZ uses a network address of 192.168.4.0. It uses the mask of 255.255.255.224 to create subnets. What is the maximum number of usable hosts in each subnet? 6 14 30 62

25.

Given a host with the IP address 172.32.65.13 and a default subnet mask, to which network does the host belong?
	172.32.65.0
	172.32.65.32
	172.32.0.0
	172.32.32.0