Intro to networks 8-10
Where is ARP table stored on device? Which router component holds routing table, ARP cache, and running configuration file?
RAM
Which two ICMPv6 messages are used in SLAAC? Which two ICMPv6 messages are used during Ethernet MAC address resolution process?
Router Advertisement Router solicitation
An administrator is configuring new router to permit out-of-band management access. Which set of commands will allow required login using password of cisco?
Router(config)# line console 0 Router(config-line)# password cisco Router(config)# login
What will Layer 2 switch do when destination MAC address of received frame is not in MAC table? Which action is taken by Layer 2 switch when it receives Layer 2 broadcast frame?
Forwards frame out of all ports except for port at which frame was received
What information is added during encapsulation at OSI Layer 3?
Source and destination IP address
What is the term for splitting up IP packet when forwarding it from one medium to another medium with smaller MTU (maximum transmission unit)?
Fragmentation
Which field is used to detect corruption in IPv4 header?
Header checksum
Which statement is correct about IPv4 packet header fields?
Source and destination IPv4 addresses remain the same while traveling from source to destination
What is stored in NVRAM of Cisco router?
Startup configuration
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?
Static map entry
What is the purpose of ARP in IPv4 network?
Obtain specific MAC address when IP address is known
What two protocols are used to determine MAC address of known destination device IP address (IPv4 and IPv6)?
ARP and ND (Neighbor Discovery)
Which destination address is used in ARP request frame?
FFFF.FFFF.FFFF
Which action is taken by Layer 2 switch when it receives Layer 2 broadcast frame?
It sends frame to all ports except port on which it received frame
The ARP table in switch maps which two types of address together?
Layer 3 address to layer 2 address
Which statement about host forwarding decisions is true?
Local hosts can reach each other without need of router
Which characteristic describes default gateway of host computer?
Logical address of router interface on same network as host computer
What destination MAC address would be included in frame sent from source device to destination device on same local network?
MAC address of destination device.
What destination MAC address would be included in frame sent from source device to destination device on remote local network?
MAC address of local router interface
When IPv4 packet is sent to host on remote network, what information is provided by ARP?
MAC address of router interface closest to sending host
How does network layer use MTU value?
MTU is passed to network layer by data link layer
What two functions are provided by ARP?
Maintains table of IPv4 to MAC address mappings Resolves IPv4 addresses to MAC addresses
To what type of address are ICMPv6 neighbor solicitation messages sent?
Multicast
What is one function of ARP protocol?
Resolving IPv4 address to MAC address
Which command is used to encrypt all passwords in a router configuration file?
Router_A (config)#service password-encryption
Which is a characteristic of static routes?
They are manually configured
Which OSI layer sends segments to be encapsulated in IPv4 or IPv6 packet?
Transport layer
Router can be configured with a combination of both static routes and dynamic routing protocol
True
When connectionless protocol is in use at lower layer of OSI model, how is missing data detected and retransmitted if necessary?
Upper-layer connection-oriented protocols keep track of data received and request retransmission from upper-level protocols on sending host
A cybersecurity analyst believes an attacker is spoofing MAC address of default gateway to perform man-in-the-middle attack. Which command should analyst use to view MAC address host is using to reach 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 trustknow1
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 IPv4 address can host use to ping loopback interface?
127.0.0.1
What does a code of "O" indicate next to a route in the routing table?
A route learned dynamically from OSPF
Which statement is true about ARP?
ARP entries are cached (stored) temporarily
A technician is configuring router to allow for all forms of management access. As part of each different type of access, technician is trying to type command login. Which configuration mode should be entered to do this task?
Any line configuration
Which statement regarding the service password-encryption command is true?
As soon as 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
A router boots and enters setup mode. What is the reason for this?
Configuration file is missing from NVRAM
Which is true of IPv6 header?
Consists of 40 octets and 8 header fields
Which layer is responsible for taking IP packet and preparing it for transmission over communications medium?
Data link medium
Which default gateway statement is true?
Default gateway address is IP address of router on local network
This type of route is also known as gateway of last resort.
Default route
When router receives packet, what information must be examined in order for packet to be forwarded to remote destination? Which information is used by routers to forward data packet toward its destination?
Destination IP address
Which field in IPv4 packet header will typically stay same during its transmission?
Destination address
Which field in IPv6 packet is used by router to determine if packet has expired and should be dropped?
Hop limit
Which is true of IPv6 packet header?
Hop limit field replaces IPv4 Time to Live field
Which three options are major issues associated with IPv4?
IP address depletion Increased network complexity and internet routing table expansion Lack of end to end connectivity
What type of information is contained in ARP table?
IPv4 address to MAC address mappings
What addresses are mapped by ARP?
IPv4 address to destination MAC address
Which statement accurately describes characteristic of IPv4?
IPv4 has 32-bit address space
Which characteristic describes an IPv6 enhancement over IPv4?
IPv6 header is simpler than IPv4 header which improves packet handling
Which two options are improvements provided by IPv6 as compared to IPv4?
Increased IP address space Uses simpler header to provide improved packet handling
Which two ICMPv6 messages are used in to determine MAC address of known IPv6 address?
Neighbor Advertisement Neighbor solicitation
Which two commands could be entered on Windows host to view its IPv4 and IPv6 routing table?
Netstat -r Route print
A computer has to send packet to destination host in same LAN. How will packet be sent?
Packet will be sent directly to destination host
What is an attack using ARP?
Poisoning
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
What is the purpose of the banner motd command?
Provides a way to make announcements to those who log in to router
What is the purpose of startup configuration file on Cisco router?
To contain commands that are used to initially configure router on startup
How does ARP process use IPv4 address?
To determine MAC address of device on same network
What was the reason for creation and implementation of IPv6?
To relieve IPv4 address
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
