Cisco Academy midterm

switches and routers perform the same functions

True/false

False

The OSI model has 8 layers

True/false

False, 7 layers

Which of the following does a router normally use when making a decision about routing TCP/IP packets?

Destination IP address

Which of the following are true about a LAN connected TCP/IP host and its IP routing (forwarding) choices?

The host sends packets to its default gateway if the destination IP address is in a different subnet than the host

Which of the following are functions of a routing protocol?

Advertising known routes to neighboring routers

Learning routes and putting those routes into the routing table for routes advertised to the router by its neighboring routers

Which protocol requires a PC to learn information from ome other server device?

DNS (Domain name system)

Which command(s) will save the current configuration to be used after the next reload?

copy run start

write memory

What are the consequences of configuring a switch port with the shutdown interface subcommand

The interface is configured with the shutdown command

The show interfaces command will list the interface with status codes of administratively down and line protocol down

The interface cannot currently be used to forward frames

What is the most likely condition to cause a switchs late collision counter to continue to increment

A duplex mismatch exists with SW1 set to half duplex

Which prefix (CIDR) format is the equivalent of 255.255.254.0

/23

Which prefix (CIDR) format is the equivalent of 255.255.255.240

/28

Which dotted decimal notation (DDN) is the equivalent of /30

255.255.255.252

Given IP 10.55.66.77, mask 255.255.255.0, what is the number of host (H) bits using classful logic

H=8

Which of the following are true about connected routes in a routing table

The routing protocol adds a route for each connected subnet

The connected route is the result of using the ip address and no shutdown interface subcommands

A router with a connected route receives a packet destined for a host on that network. What does the router do next?

Send an ARP request to find the hosts MAC address

Which CDP commands could tell you information about a neighboring routers IOS version without connecting to it

show cdp neighbors [hostname]

show cdp entry [hostname]

Which LLDP commands could identify a neighbors model of hardware?

show lldp neighbors

show lldp entry [hostname]

Which of the following are a benefit of EtherChannel?

Increases bandwidth between switches

Provides redundancy for the link between switches

Which of the following are true about a switches Bridge ID (BID) as used by STP

The BID consists of the Bridge Priority value and the switches MAC address

The switch with the lowest BID is chosen as the Root Bridge

Which of the following are problems caused by not using STP in a redundant LAN design

Broadcast storms

MAC address table instability

Duplicate frames

Which STP port role is used to break a layer 2 loop?

blocking port

Which of the following are true about layer 3 etherchannel configuration

The ip address command must be on the port channel 1 interface

The port-channel 1 interface must be configured with the no switchport command

Which settings on a physical interface could prevent it from being bundled into an existing layer 3 etherchannel

A different speed (speed value)

A default setting for switchport

What two values are primarily used when comparing dynamic routing protocols?

Administrative distance and metric

On a multi access network, which value is primarily used to select the DR/BDR

highest OSPF router ID

Which multicast address does a router send an LSU to on a milti access segment

224.0.0.6

In a multi-access network with a DR and BDR, what state does the neighbor relationship with the DROther routers remain in?

2 way state

Which command is used to change the OSPF priority for DR/BDR election

ip ospf priority [0-255] on the interface

Which command is often used to see a routers role (DR, BDR, or DROther) on an OSPF interface

show ip ospf interface

How long is an IPv6 address, and what is the reason for its size?

128 bits; necessary due to IPv4 address exhaustion

What is the purpose of the router solicitation (RS) message, and what multicast address is sent to?

To ask all routers to identify themselves; sent to FF02::2 (all IPv6 routers)

Which multicast address do routers send unsolicited router advertisement (RA) messages to

FF02::1 (all IPv6 hosts)

What key piece of identifying information does a router include in its RA message?

The link local IPv6 address of the router

What three step process is used by a host to form its own IPv6 address using SLAAC?

1. Learn prefix/length 2. build address (prefix + interface ID) 3. use DAD (duplicate address detection)

Which NDP message is used by a host to perform duplicate address detection (DAD)

Neighbor solicitation (NS) and neighbor advertisement (NA)

Which of the following protocols are examples of TCP/IP transport layer protocols?

TCP and UDP

Which of the following terms is used specifically to identify the entity created when encapsulating data inside data-link layer headers and trailers?

Frame

In the LAN for a small office, some user devices connect to the LAN using a cable, while others connect using wireless technology (and no cable). Which of the following is true regarding the use of Ethernet in this LAN?

Only the devices that use cables are using ethernet

Which of the following fields in the HDLC header used by Cisco routers does Cisco add, beyond the ISO standard HDLC?

Type

Two routers, R1 and R2, connect using an Ethernet over MPLS service. The service provides point-to-point service between these two routers only, as a Layer 2 Ethernet service. Which of the following are the most likely to be true about this WAN?

R1 will connect to a physical Ethernet link, with the other end of the cable connected to a device at the WAN service provider point of presence.

R1 will forward data-link frames to R2 using an Ethernet header/trailer.

What is the most common network cable connector used in Ethernet?

RJ-45

On a LAN RJ-45 connector, what name is given to the eight physical connections that make contact when connected?

Pins

Assuming Auto-MDIX is not supported, which of these devices would require a straight-through cable when connecting to an Ethernet switch?

Router and PC

An Ethernet address is also commonly referred to as a ________ address

MAC

Which of the following protocols are used to establish a point-to-point serial link?

HDLC

You just unpacked a brand new Cisco 2960 switch. Which ports/interfaces are ready to connect to and be used to set up the switch?

Console

Which of the following commands would you issue to move from the User EXEC mode to the Privileged EXEC mode?

enable

A Cisco switch has four memory areas that store various files as well as the IOS. In which memory area is the bootstrap program stored?

ROM

You have just completed the setup of your new Cisco 2960 switch, and you need to save your work. To save the configuration file, you would issue which of the following commands?

copy running-config startup-config

when using the no speed command on an interface, what is the resulting change made?

The speed setting defaults to its automatic configuration

What is the correct formula for calculating the number of usable host IP addresses in a subnet?

2x - 2, X = host bits

How many  hosts are provided by the network 192.168.254.0/24

254

what is the network and broadcast address of this IP 203.10.10.156/24

203.10.10.0 and 203.10.10.255

Switch SW1 uses its Gigabit 0/1 interface to connect to switch SW2’s Gigabit 0/2 interface. SW2’s Gi0/2 interface is configured with the speed 1000 and duplex full commands. SW1 uses all defaults for interface configuration commands on its Gi0/1 interface.

Which of the following are true about the link after it comes up?

The link works at 1000 Mbps (1 Gbps).

Both switches use full duplex.

Working at the help desk, you receive a call and learn a user’s PC IP address and mask (192.168.9.1/24). When thinking about this using classful logic, you determine the

number of network (N),and host (H) bits. Which of the following is true in this case?

N=24

H=8

Which of the following statements is true about classless IP addressing concepts?

Ignores Class A, B, and C network rules

Which of the following answers lists the prefix (CIDR) format equivalent of  255.255.254.0?

/23

Which of the following answers lists the prefix (CIDR) format equivalent of

255.255.255.240?

/28

Before Class B network 172.16.0.0 is subnetted by a network engineer, what parts of

the structure of the IP addresses in this network already exist, with a specific size?

Network and Host

Consider the following output from a Cisco Catalyst switch:

SW1# show mac address-table dynamic

 Mac Address Table

-------------------------------------------

Vlan Mac Address Type Ports

---- ----------- -------- -----

 1 02AA.AAAA.AAAA DYNAMIC Gi0/1

 1 02BB.BBBB.BBBB DYNAMIC Gi0/2

 1 02CC.CCCC.CCCC DYNAMIC Gi0/3

Total Mac Addresses for this criterion: 3

Which of the following answers is true about this switch?

02CC.CCCC.CCCC was learned from the source MAC address of a frame that entered port Gi0/3

Which of the following commands is used to enable console password security using ONLY a simple password?

login

Which of the following commands is used to initiate the configuration mode to set a password for Telnet?

line vty 0 15

Which of the following commands should immediately follow interface vlan 1 when configuring IPv4 on a switch?

ip address ip-address mask

Imagine a network with two routers that are connected with a point-to-point HDLC

serial link. Each router has an Ethernet, with PC1 sharing the Ethernet with Router1

and PC2 sharing the Ethernet with Router2. When PC1 sends data to PC2, which of

the following is true?

Router1 strips the Ethernet header and trailer off the frame received from PC1, never to be used again

A company implements a TCP/IP network, with PC1 sitting on an Ethernet LAN.

Which of the following protocols and features requires PC1 to learn information from

some other server device?

DNS