Core Network Protocols
Understanding Network Packets, Protocols and Archtectures
Understanding Network Packets, Protocols and Archtectures
Kartei Details
| Karten | 122 |
|---|---|
| Sprache | English |
| Kategorie | Informatik |
| Stufe | Berufslehre |
| Erstellt / Aktualisiert | 03.09.2014 / 16.09.2020 |
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What is RIR?
Regional Internet Registries
How many addresses are defined in ARP?
2
Is an ARP message routable?
No, the message do not contain in IP header.
Describe the Ethernet addressing used in the standard ARP request. Are the source and destination addresses unicast, broadcast or multicast?
The ARP request uses a unicast address for the source and a broadcast address for the destination.
What is a gratuitous ARP?
This a node sending an ARP request out for its own IP address in order to determine if another node is using the same address.
What information is stored in an ARP table?
The ARP table contains a mapping between host MAC and IP addresses. It also shows whether each entry is static or dynamic.
Can we send standard ARP messages directly to computers that are not on our own network?
No, ARP is not routable.
Is ARP included in IPv6?
Is ARP a secure protocol?
No, false ARP messages can be to fool ARP tables. Hosts then make incorrect forwarding decisions. ARP transmissions are also sent in the clear.
What is the Ethertype hexadecimal value for an ARP message?
0806
What is WAN?
Wide Area Network
Match the following devices to the proper networking model layer.
a) Hub A) Application
b) Switch B) Transport
c) Access Point C) Internetwork
d) Router D) Network/Link
E) Physical
E, D, D, C
Match the following devices to the type of addressing prodessed.
a) Hub A) Port
b) Switch B) IP address
c) Access Point C) MAC address
d) Router D) 1s and 0s
D, C, C, B
Match the following devices to the table s used to process packets or frames. For some devices you may select more than one table.
a) Host A) Routing Table
b) Switch B) Source Address Table
c) Access Point C) Forwarding Database
d) Router D) ARP Table
Host A, D
Switch B
Access Point C
Router A, D
Switched stop collisions from propagating. True or False?
APs stop broadcast frames from propagating. True or false?
A SAT is a mapping between MAC address and IP addresses. True or false?
While Routers process packets, they do not change or manipulate the frame or the packet itself. True or false?
A default gateway is a router interface. True or false?
A multilayer switch is simply a switch that understands how to forward packets between VLANs. True or false?
One of the reasons switches are very fast even when connected to a wireless network is that Ethernet frames and 802.11 frames are almost identical.
What is AP?
Access Point
What is SAT?
Source Address Table
What is DTE?
Date Terminal Equipment
What is SSID?
Service Set Identifier
What is BSSID?
Basic Service Set Identifier
What is FDB?
Forwarding Data Base
What is WEP?
Wired Equivalent Privacy
What is WPA-PSK?
Wifi Protected Access with a Pre-Shared Key
What is the payload of an ICMP echo request from Windows?
The alphabet
Provide two examples of ICMP messages that include 64 bits of the original message.
Redirect, destination unreachable, time exceeded
What is the "all routers multicast" address?
224.0.0.2
What is the IP "next header" or protocol value for ICMP?
01
Router solicitations and advertisements are not very common. What protocol is used instead?
DHCP
What is the IPv6 process that replaces ARP and uses several different types of ICPv6 messages?
Neighbor discovery
What are the type and code values of the ICMP network destination unreachable message?
3 and 0
What event causes an ICMP time exceeded message to be generated?
The IP TTL field is decremented to 0
Instead of a TCP or UDP port number, what value is used when forwarding ICMP packets through a NAT router?
The ICMP indentifier
On the receiving host, what is the effect of an ICMP redirect message?
A route is added to the local host routing table for use in subsequent transmissions
What is DOS?
Disk Operating System
