Modules 8-13 CCNA Exam
How does the ARP process use an IPv4 address?
To determine the MAC address of a device on the same network
What is the purpose of the subnet mask in conjunction with an IP address?
To determine the subnet to which the host belongs
Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
To identify the network address of the destination network
What is the purpose of ARP in an IPv4 network?
To obtain a specific MAC address when an IP address is known
What was the reason for the creation and implementation of IPv6?
To relieve IPv4 address depletion
Which OSI layer sends segments to be encapsulated in an IPv4 or IPv6 packet?
Transport Layer
A router can be configured with a combination of both static routes and a dynamic routing protocol.
True
IPv6 was designed with subnetting in mind.
True
When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary?
Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-layer protocols on the sending host
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
Company policy requires using the most secure method to safeguard access to the privileged exec and configuration mode on the routers. The privileged exec password is trustknow1. Which of the following router commands achieves the goal of providing the highest level of security?
enable secret trustknown1
An administrator is configuring a new router to permit out-of-band management access. Which set of commands will allow the required login using a password of cisco?
line console 0, password cisco, login
Which command can be used on a Windows host to display the routing table?
netstat -r
What will be the response from the router after the command, "router(config)# hostname portsmouth" is entered?
portsmouth(config)#
Which command could be used on a Cisco router to view its ARP table?
show ip arp
Which command can be used on a Cisco router to display all interfaces, the IPv4 address assigned, and the current status?
show ip interface brief
What is the command used on a Cisco IOS router to view the routing table?
show ip route
What is the prefix length notation for the subnet mask 255.255.255.224?
/27
What is the recommended prefix length for most IPv6 subnets?
/64
Host-A has the IPv4 address and subnet mask 10.5.4.100 255.255.255.0. What is the network address of Host-A?
10.5.4.0
Given a /48 Global Routing Prefix and a /64 prefix, what is the subnet portion of the following address: 2001:db8:cafe:1111:2222:3333:4444:5555
1111
Which IPv4 address can a host use to ping the loopback interface?
127.0.0.1
If a network device has a mask of /28, how many IP addresses are available for hosts on this network?
14
Host-A has the IPv4 address and subnet mask 172.16.4.100 255.255.0.0. What is the network address of Host-A?
172.16.0.0
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
2001:0DB8:0000:AB00:0000:0000:0000:1234
What is the prefix associated with the IPv6 address 2001:DB8:D15:EA:CC44::1/64?
2001:DB8:D15:EA::/64
What subnet mask is represented by the slash notation /20?
255.255.240.0
Which subnet mask would be used if 5 host bits are available?
255.255.255.224
Which subnet mask would be used if exactly 4 host bits are available?
255.255.255.240
A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.224. How many usable host addresses will this subnet provide?
30
How many usable IP addresses are available on the 192.168.1.0/27 network?
30
Given a /32 Global Routing Prefix and a /64 prefix, how many bits would be allocated for the Subnet ID?
32
A network administrator subnets the 192.168.10.0/24 network into subnets with /26 masks. How many equal-sized subnets are created?
4
How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
62
If a network device has a mask of /26, how many IP addresses are available for hosts on this network?
62
What does a code of "O" indicate next to a route in the routing table?
A route leaned dynamically from OSPF
Which statement is true about ARP?
ARP entries are cached temporarily
What is an attack using ARP?
ARP poisioning
A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?
Any line configuration mode
Which statement regarding the service password-encryption command is true?
As soon as the 'service password-encryption' command is entered, all currently set passwords formerly displayed in plain text are encrypted
Which delivery method does not guarantee that the packet will be delivered fully without errors?
Best Effort
Which layer is responsible for taking an IP packet and preparing it for transmission over the communications medium?
Data Link Layer
This type of route is also known as a gateway of last resort.
Default route
What is the most important motivating factor for moving to IPv6?
Depletion of the IPv4 addresses
Which field in an IPv4 packet header will typically stay the same during its transmission?
Destination Address
When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination?
Destination IP address
Which information is used by routers to forward a data packet toward its destination?
Destination IP address
Which of the following techniques use native IPv6 connectivity?
Dual stack
Which IPv6 network prefix is only intended for local links and can not be routed?
FE80::/10
Which destination address is used in an ARP request frame?
FFFF.FFFF.FFFF
4 out of 5 RIRs no longer have enough IPv4 addresses to allocate to customers on a regular basis.
False
RA messages are sent to all IPv6 routers by hosts requesting addressing information.
False
The Subnet ID field in an GUA must borrow bits from the interface ID.
False
What is the term for splitting up an IP packet when forwarding it from one medium to another medium with a smaller MTU?
Fragmentation
Which part of a GUA is assigned by the ISP?
Global routing prefix
Which field is used to detect corruption in the IPv4 header?
Header Checksum
Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped?
Hop Limit
What does the IP address 172.17.4.250/24 represent?
Host address
What type of information is contained in an ARP table?
IPv4 address to MAC address mappings
What addresses are mapped by ARP?
IPv4 address to destination MAC address
Which statement accurately describes a characteristic of IPv4?
IPv4 has a 32-bit address space
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?
It forwards the frame out of all the ports except for the port at which the frame was received
What is the purpose of the banner motd command?
It provides a way to make announcements to those who log in to a router
Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame?
It sends the frame to all ports except the port on which it received the frame
What is the purpose of the command ping ::1?
It tests the internal configuration of an IPv6 host
What type of IPv6 address begins with fe80?
LLA (Link-local Address)
Which type of IPv6 unicast address is not routable between networks?
LLA (Link-local Address)
The ARP table in a switch maps which two types of address together?
Layer 3 address to a Layer 2 address
What type of address is automatically assigned to an interface when IPv6 is enabled on that interface?
Link-local
Which statement about host forwarding decisions is true?
Local hots can reach each other without the need of a router
Which dynamic addressing method for GUAs is the one where devices rely solely on the contents of the RA message for their addressing information?
Method 1: SLAAC (Stateless Address Autoconfiguration)
Which dynamic addressing method for GUAs is the one where devices get their IPv6 configuration in a RA message and request DNS information from a DHCPv6 server?
Method 2: SLAAC and stateless DHCPv6
Which dynamic addressing method for GUAs is the one where devices rely solely on a DHCPv6 server for their addressing information?
Method 3: Stateful DHCPv6
To what type of address are ICMPv6 neighbor solicitation messages sent?
Multicast
Which CLI mode allows users to access all device commands, such as those used for configuration, management, and troubleshooting?
Privileged EXEC mode
Which field includes common values such as ICMP (1), TCP (6), and UDP (17)?
Protocol
Where is the ARP table stored on a device?
RAM
Which router component holds the routing table, ARP cache, and running configuration file?
RAM
Which organization or group of organizations receives IP addresses from IANA and is responsible for allocating these addresses to ISPs and some organizations?
RIRs (Regional Internet Registry)
What is one function of the ARP protocol?
Resolving an IPv4 address to a MAC address
Which devices will not forward an IPv4 broadcast packet by default?
Router
Which command is used to encrypt all passwords in a router configuration file?
Router_A (config)# service password-encryption
What information is added during encapsulation at OSI Layer 3?
Source and destination IP address
Which field in an IPv6 GUA is used for subnetting?
Subnet ID
Which is true of the IPv6 packet header?
The Hop Limit field replaces the IPv4 Time to Live Field
Which characteristic describes an IPv6 enhancement over IPv4?
The IPv6 header is simpler than the IPv4 header is, which improves packet handling
What destination MAC address would be included in a frame sent from a source device to a destination device on the same local network?
The MAC address of the destination device
What destination MAC address would be included in a frame sent from a source device to a destination device on a remote local network?
The MAC address of the local router interface
When an IPv4 packet is sent to a host on a remote network, what information is provided by ARP?
The MAC address of the router interface closest to the sending port
How does the network layer use the MTU value?
The MTU is passed to the network layer by the date link layer
A router boots and enters setup mode. What is the reason for this?
The configuration file is missing rom NVRAM
Which default gateway statement is true?
The default gateway address if the IP address of the router on the local network
Which characteristic describes the default gateway of a host computer?
The logical address of the router interface on the same network as the host computer
A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?
The packet will be sent directly to the destination host
Which statement is true about variable-length subnet masking?
The size of each subnet may be different, depending on requirements
Which statement is correct about IPv4 packet header fields?
The source and destination IPv4 addresses remain the same while travelling from the source to the destination
What is stored in the NVRAM of a Cisco router?
The startup configuration
Which is a characteristic of static routes?
They are manually configured
A PC is configured to obtain an IPv4 address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?
This is a static map entry
What is the purpose of the startup configuration file on a Cisco router?
To contain the commands that are used to initially configure a router on a startup
