Hosts must maintain their own local routing table to ensure that network layer packets are directed to the correct destination network. This local table typically contains a route to the loopback interface, a route to the network that the host is connected to, and a local default route, which represents the route that packets must take to reach all remote network addresses.4.
4. A technician uses the ping 127.0.0.1 command. What is the technician testing?
A. Physical connectivity of a particular PC and the network
B. the TCP/IP stack on a network host
C. connectivity between two PCs on the same network
There are two rules for IPv6 address compression. Rule 1: leading zeros in any hextet can be removed. Rule 2: contiguous hextets of all zeros can be compressed to a double colon. Rule two can only be applied once.
6. Which function or operation is performed by the LLC sublayer?
A. It adds a header and trailer to a packet to form an OSL Layer 2 PDU
The Ethernet LLC sublayer has the responsibility to handle communication between the upper layers and the lower layers of the protocol stack. The LLC is implemented in software and communicates with the upper layers of the application to transition the packet to the lower layers for delivery.
7. How many usable IP addresses are available on the 192.168.1.0/27 network?
A /27 mask is the same as 255.255.255.224. This leaves 5 host bits. With 5 host bits, 32 IP addresses are possible, but one address represents the subnet number and one address represents the broadcast address. Thus, 30 addresses can then be used to assign to network devices.
8. Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a
description of the default gateway address?
A. It is the IP address of the router interface that connects the company to the Internet
B. It is the IP address of the ISP network device located in the cloud
C. It is the IP address of Switch1 that connects PC1 to other devices on the same LAN
D. It is the IP address of the Router1 interface that connects the PC1 LAN to Router1
The default gateway is used to route packets destined for remote networks. The default gateway IP address is the address of the first Layer 3 device (the router interface) that connects to the same network.
An IPv6 address is made up of 128 bits that are represented as eight blocks of four hexadecimal digits that are called hextets. Because each hexadecimal digit represents four bits, each hextet represents 16 bits. The /64 network prefix indicates that the first 64 bits, or first four hextets, represent the network portion of the address. Because there are 128 bits in an IPv6 address, this leaves the last 64 bits, or last four hextets, to represent the host identifier. The value for the last four hextets is 0607:1234:aa10:ba01.
11. Which statement describes a MAC address?
A.It is a physical address assigned to an Ethernet NIC by the manufacturer
B. It is 128-bits in length
C. It contains two portions, the network portion and the host portion
D. It identifies the source and destination addresses of hosts on the Internet
The Media Access Control (MAC) address is a physical address assigned to each Ethernet NIC by manufacturers. It is 48-bits in length. The MAC address is used to identify the source and destination on a local Ethernet network. It cannot be routed to remote networks.
12. Why does a Layer 3 device perform the ANDing process on a destination IP address
and subnet mask?
A. To identify the host address of the destination host
B. To identify faulty frames
C. To identify the broadcast address of the destination network
D. To identify the network address of the destination network
The Internet Protocol (IP) is a connectionless, best effort protocol. This means that IP requires no end-to-end connection nor does it guarantee delivery of packets. IP is also media independent, which means it operates independently of the network media carrying the packets.
14. Which three IP addresses are private ? (Choose three.)