Cisco ITN 154 Chapters 8-10 Summative Questions

What protocol is used to discover the MAC address of a host that belongs to the same network.

ARP. (When a PC wants to send data on the network, it always knows the IP address of the destination. However, it also needs to discover the MAC address of the destination. ARP is the protocol that is used to discover the MAC address of a host that belongs to the same network.)

Refer to the exhibit. Matching the packets with their destination IP address to the exiting interfaces on the router, which one is INCORRECT.

Packets with a destination of 172.17.14.8 are forwarded through S0/0/0.

Telnet

Remote access method that uses dialup connection

I can access another computer/server in my network, but I cannot access a computer/server in another network. What is the problem?

The computer has an invalid default gateway address.

Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC2. What will the switch do with the frame?

The switch will forward the frame only to port 3.

The purpose of configuring a switch with a default gateway address is used to forward packets originating from the switch to remote networks.

True. (A default gateway address on a switch does not provide Layer 3 routing for PCs that are connected on that switch. A switch can still be accessible from Telnet as long as the source of the Telnet connection is on the local network.)

Which term describes a field in the IPv4 packet header that contains a unicast, multicast, or broadcast address?

destination IPv4 address

A network administrator wants to secure access to a router through a connection to the console interface. Which three commands would the network administrator use?

line console 0 password cisco login (Note: The line vty 0 4 command is used to access the configuration mode for Telnet.)

Which option is not a major issue with IPv4?

too many IPv4 addresses available

There are three major phases to the bootup process of a Cisco router

1. Perform the POST and load the bootstrap program. 2. Locate and load the Cisco IOS software. 3. Locate and load the startup configuration file. (If a startup configuration file cannot be located, the router will enter setup mode by displaying the setup mode prompt.)

Which IPv4 address can a host use to ping the loopback interface?

127.0.0.1

SSH

A remote access method that uses encryption. Stronger authentication than Telnet

What property of ARP allows MAC addresses of frequently used servers to be fixed in the ARP table?

A static IP-to-MAC address entry can be entered manually into an ARP table.

A router boots and enters setup mode. What is the reason for this?

Configuration file is missing from NVRAM.

Which destination address is used in an ARP request frame?

FFFF.FFFF.FFFF. ARP sends a layer 2 (switch) broadcast to all devices on the Ethernet LAN. Frame contains IP address of destination and broadcast MAC address. The host with the IP address that matches the IP address in the ARP request will reply with a unicast frame that includes the MAC address of the host.

The Layer 2 device, such as a switch, uses the destination IP address to determine which path (interface or port) should be used to send the data onward to the destination device.

False. A layer 2 device, such as a switch, uses the MAC address. A router at Layer 3 uses the destination IP address.

Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame?

It floods the frame out all ports except the port on which it received the frame.

Refer to the exhibit. Consider the IP address configuration shown from PC2. What is a description of the default gateway address for PC2?

It is the IP address of the Router1 interface that connects the PC2 LAN to Router2. The default gateway IP address is the address of the first Layer 3 device (the router interface) that connects to the same network.

Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on?

The frame has the broadcast address as the destination address. The destination address is unknown to the switch.

Which field in the IPv4 header is used to limit the lifetime of a packet so it does not traverse a network endlessly?

Time-to-Live

What is one function of the ARP protocol?

To resolve an IPv4 address to a MAC address. DHCP is used to obtain an IPv4 address dynamically. DNS is used to map a domain name to its IP address.

What information does the loopback test provide?

Verifies that the host NIC and drivers are functioning. The TCP/IP stack on the device is working correctly.

A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?

arp -a

phase 2

locate and load the cisco ios sofware

phase 3

locate and load the startup configuration file

Which command can be used on a Windows host to display the routing table?

netstat -r

Console

out of band that is directly connected

Which two functions are primary functions of a router?

packet forwarding and path selection

phase 1

perform the POST and load the bootstrap program

Router(config)# enable password cisco123

provides security on the console

AUX

remote access that is not secured nor preffered

Which term describes a field in the IPv4 packet header that contains a 32-bit binary value associated with an interface on the sending device?

source IPv4 address

What is the aim of an ARP spoofing attack?

to associate IP addresses to the wrong MAC address