Module 8 Practice Flashcards
(33 cards)
Which OSI layer sends segments to be encapsulated in an IPv4 or IPv6 packet?
Transport layer
Which layer is responsible for taking an IP packet and preparing it for transmission over the communications medium?
Data link layer
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 delivery method does not guarantee that the packet will be delivered fully without errors?
Best Effort
What are the two most commonly referenced fields in an IPv4 packet header that indicate where the packet is coming from and where it is going?
source IP address
destination IP address
Which statement is correct about IPv4 packet header fields?
The source and destination IPv4 addresses remain the same while travelling from source to destination.
Which field is used to detect corruption in the IPv4 header?
Header Checksum
Which field includes common values such as ICMP (1), TCP (6), and UDP (17)?
Protocol
Which three options are major issues associated with IPv4? (Choose three.)
- IP address depletion
- increased network complexity and Internet routing table expansion
- lack of end-to-end connectivity
Which two options are improvements provided by IPv6 as compared to IPv4? (Choose two.)
- increased the IP address space
- uses a simpler header to provide improved packet handling
Which is true of the IPv6 header?
- it consists of 40 octets.
- it contains 8 header fields.
Which is true of the IPv6 packet header?
The Hop Limit field replaces the IPv4 Time to Live field.
Which statement about host forwarding decisions is true?
Local hosts can reach each other without the need of a router.
Which default gateway statement is true?
The default gateway address is the IP address of the router on the local network.
Which two commands could be entered on a Windows host to view its IPv4 and IPv6 routing table? (Choose two.)
- netstat -r
- route print
What is the command used on a Cisco IOS router to view the routing table?
show ip route
What does a code of “O” indicate next to a route in the routing table?
a route learned dynamically from OSPF
Which is a characteristic of static routes?
They are manually configured
This type of route is also known as a gateway of last resort.
default route
True or False? A router can be configured with a combination of both static routes and a dynamic routing protocol.
True
Which command can be used on a Windows host to display the routing table?
netstat -r
(windows host)
What information is added during encapsulation at OSI Layer 3?
source and destination IP address
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-level protocols on the sending host.
How does the network layer use the MTU value?
The MTU is passed to the network layer by the data link layer
