TCP/IPNetwork Administration-Solaris™ Operating Environment

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61.If an interface(hme1) is not displayed by the "ifconfig -a" command, what should you do?

# ifconfig hme1 up
# ifconfig hme1 plumb x
Verify /etc/hostname.hme1 exists x
# ifconfig hme1 up broadcast

62.What is the name of the argument in the SOA record which defines the time interval, in seconds, in which a master secondary server should check to see if the serial number has changed and determine if a zone transfer should happen

"refresh" or "refresh timer" is correct!

63.The DHCP database, "dhcp_network" is managed with what command?

Yes, "pntadm" is correct!
Because the format of this database can change, it is recommended to use the pntadm command. The dhcptab macro table is updated via the dhtadm utility.

64.What is the term to describe a packet which is less than 64 bytes?

Yes, "Runt" or "Runts" is correct!

65.Order the routing algorithm: (1) If no route to host, generate ICMP error message (2) Check LAN for destination hosts (3) Check routing table for matching network number (4) Check for default route in routing table (5) Check routing table for matching host IP address

3, 5, 4, 1, 2
2, 5, 3, 4, 1 x
2, 3, 5, 4, 1
4, 2, 3, 5, 1

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66.The ISO/OSI network model is a 5 layer model developed by the department of defense in 1979.

True
False x

The TCP/IP Model has 5 layers and was developed by the DOD in 1979. The ISO/OSI model is a 7 layer model developed in the 1980s

67.Which command is useful in determining if there are duplicate IP addresses on the network?

arp x
who
prtdiag
snoop x

arp -a will give the ip address associated with the ethernet address. If you are able to ping an IP of a system, use the arp command to verify it is correctly corresponding to the the destination MAC. The destination MAC can be displayed with the banner command at the OK prompt or with the ifconfig command as root.

68.Which of the following are typical causes of network input errors?

A bad transceiver x
Bad port on hub or switch  x
Too much network traffic(congestion) x
Duplicate IP address on subnet x

69.Which is NOT a valid interface in Solaris?

ba0
vge0
nf0
fd0 x

ATM=ba0; Ethernet=le0,qe0; Fast Ethernet=be0,hme0,qfe0; FDDI=nf0; Token Ring=tr0; Gigabit=vge0,ge0

70.Which is NOT a proper step in autoconfigurating a IPv6 address?

Add two octets: 0xFF and 0xFE (11111111 11111110)
Convert to hex and add decimals x
Obtain 48 bit MAC address
Toggle bit 6 x

The steps are: Obtain MAC address; Toggle bit 7(not 6); Add 2 octets(FF and FE); Convert to hexadecimal and add colons. This is then appended to the format prefilx(FP) to create a 128 bit address.

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71.Which of the following are valid TYPE values for a dhcptab entry?

i (Include)
s (symbol)
f (force)
m (macro) x

The s(symbol) type defines vendor and site specific options. The m(macro) type defines a macro definition.

72.A collection of networks under a single administrative control is called?

Yes, "AS" or "Autonomous System" is correct!

73.What are the recommended ways to implement a DHCP server?

Run the GUI dhcpmgr utility x
Manually modifying DHCP config files
Executing the shell based dhcpconfig utility x
Copy config from an existing DHCP server

74. What collision rate percentage in Ethernet is considered to be an indication of network loading

5% x
10%
20%
30%

5% collision rate is considered to be an indication of network loading. 10% collision rate signifies an overloaded network which should be segmented.

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76.Which are true about client DNS resolver?

DNS servers are specified via the /etc/resolve.conf
Is part of the BIND release
Does NOT cache any information received from DNS servers x
Is activated by the hosts entry in /etc/nsswitch.conf file x

The resolver is typically built into the OS. The DNS servers are specified in the file /etc/resolv (no e at the end) file.

77.A frame is defined at which layer of theTCP/IP model?

Internet
Network Interface x
Data Link
Hardware

A frame is a series of bits with a well-defined beginning and end. The data link layer is defined in the OSI model, NOT TCP/IP.

78.Which commands show if a NIC device is recognized by the system?

ifconfig -a x
prtconf x
dmesg x
modinfo

79.Which layer of the ISO/OSI model specifies a type field to determine which network protocol is being used?

Network
Transport
Data Link x
Application

The data link layer provides communication between nodes on the same subnet. It also creates a frame from the network layer that provides: A synchronization field for the receiver; Destination and source hardware address; and a type field for the network layer

80.BIND automatically knows where to find the ROOT servers.

True
False x

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81.What record type is used in reverse lookups or the inverse domain file in DNS?

Yes, "PTR" is correct!

82.IEEE 802.5 specifies which standard?

Ethernet
Token Ring x
Token Bus
ATM

83.Enter each layer of the ISO/OSI model from highest layer to lowest layer seperated by a space.

"Application Presentation Session Transport Network Data Link Physical" is correct!
I remeber each layer by the phrase "All People Seem To Need Data Processing"

84.Which specification allows fast ethernet signals over Cat 3,4 and 5 UTP cable?

100BaseTx
100BaseT4 x
100BaseFX
1000BaseT

1000BaseT4 operates over 4 wire pairs. One pair is transmit, One is Receive, the other 2 are bidirectional

85.Type the command that displays a system's routing table:

"netstat -r" is correct!

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86.What configuration file is used by BIND version 8?

"named.conf" or "/etc/named.conf" is correct!

87.Whcih DNS Resource record type specifies a list of hosts that are configured to receive mail sent to this domain?

NS
CNAME
PTR
MX x

88.What 3 types of addresses exist within IPv6?

Unicast x
Broadcast
Multicast x
Anycast x

There is NO broadcast mechanism in IPv6. Multicasts take over this function.

89.Which DNS Security option limits which secondary servers can issue a zone transfer?

zone-transfer
allow-query
allow-transfer x
allow-zone

90.What protocol describes the process of obtaining an ethernet address from an IP address?

Yes, "ARP" is correct!

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91.Gigabit ethernet runs at 1000Mbps over only fibre optic cabling.

True
False

1000BaseX has 3 implementations: 1000BaseSX, 1000BaseLX and 1000BaseCX. The 1000BaseCX implementation runs over copper jumper cables(twinax) at 25 meters.

91.SLIP and PPP are examples of which layer in the TCP/IP model?

Application
Transport
Internet
Network Interface x

92.Which are routing protocols between autonomous systems?

RIP
EGP x
EIGRP
BGP x

93．The client-server relationship functions at which layers of the TCP/IP model?

Application x
Internet
Transport x
Session

94.Which are true concerning rpcbind?

Also known as portmap in prior OS releases. x
Listens on port 111 x
RPC services are registered with rpcbind via the /etc/rpc file x
All RPC services start on boot up prior to starting rpcbind

Some rpc services are started on demand by inetd.

95.What are the two components of a LAN architecture?

Interface Cards and Network Medium x
Software and Hardware x
Clients and Servers
Hardware and Firmware

An example of software is a protocol suite. An example of hardware is the physical medium which carries network traffic

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96.Which provides the longest distance?

1000BaseSX at 62.5 micron multimode fiber
1000BaseSX at 50 micron multimode fiber
1000BaseLX at 62.5 micron multimode fiber
1000BaseLX at 9 micron single mode fiber x

1000BaseSX at 62.5 micron multimode fiber = 300m; 1000BaseSX at 50 micron multimode fiber = 550m; 1000BaseLX at 62.5 micron multimode fiber = 550m; 1000BaseLX at 9 micron single mode fiber = 3000m

97.Which is NOT a valid route command?

route add net 10.10.1.0 Apple 1
route flush
route monitor
route del net 10.10.1.0 Apple x

The correct route deletion command would be "route delete net Apple"

98.Network Time Protocol(NTP) uses only broadcasts to update clients.

True
False x

NTP uses broadcasts and multicasts

99.Which LAN topology guarantees that the maximum distance between 2 nodes is two segments.

Bus
Ring
Star x
Token

100.Which of the following are NOT true regarding Virtual Interfaces?

Maximum 256 virtual interfaces supported x
Virtual interfaces are created by file format /etc/hostname.xxn:#
Each virtual interface must have a corresponding entry in /etc/hosts
Many virtual interfaces do NOT have an affect on network load or system startup performance. x

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101.Which of the following are reasons IPv6 was created?

Security x
Performance x
IPv4 address shortage x
Autoconfiguration x

102.What are the advantages of RIP?

Stable and easily implemented x
Supports load balancing
Updates are made infrequently. Updates are sent when topology changes
Updates to routing table occur dynamically x

Updates happen every 30 seconds which causes unneeded traffic. RIP does not support load balancing.

103.Packet buffering and retransmission are NOT supported in a switch.

True
False x

104.IPv6 verifies that the IP address assigned is unique by sending a solicitation message to the address in question.

True x
False

105.Which is NOT true of ATM?

24 dedicated time slice channels x
Uses entire bandwidth of WAN link by asynchronous communication x
53 byte cells with 48 bytes of info and 5 bytes of overhead
Defined speeds from 50 Mbps to 622 Mbps

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106.Which are NOT true about an Ethernet Address?

Contains 12 hexadecimal numbers
8:0:20 and 0:0:be are valid first 3 octets for Sun's vendor specific identifier
Sun has always used a "per port approach" to assigning a MAC address x
46 bits long x

Ethernet address is 48 bits long. Also, prior to the new network drivers, Sun used a "per station address" rather than per NIC address.

107.What are the 2 types of routing? Seperate with a space.

"direct routing indirect routing", "direct route indirect route", "indirect direct" or "direct indirect" is correct!
Direct routing is when the destination is on the same subnet as the source. Indirect is when the destination is on a different subnet than the source.

108.An IPv4 datagram header is simpler than an IPv6 datagram header.

True
False x

109.An IPv6 ________ autoconfiguration requires the setup of a configuration server such as a DHCP server.

"stateful" is correct!

110.Stateless autoconfiguration of IPv6 is where a host can generate its own link-local adress by a combination of:

Information advertised by routers x
A configuration server such as DHCP
Locally available information x
Other hosts on the network x